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120213231220 = 22543764318289
BaseRepresentation
bin110111111110101000…
…1000101011001110100
3102111021212101212202001
41233331101011121310
53432144041344340
6131120350425044
711453665414525
oct1577521053164
9374255355661
10120213231220
1146a89264975
121b36b202184
13b44a424ba4
145b657b084c
1531d8a7529a
hex1bfd445674

120213231220 has 48 divisors (see below), whose sum is σ = 258366588480. Its totient is φ = 46958317056.

The previous prime is 120213231199. The next prime is 120213231241. The reversal of 120213231220 is 22132312021.

It is an interprime number because it is at equal distance from previous prime (120213231199) and next prime (120213231241).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6563836 + ... + 6582124.

It is an arithmetic number, because the mean of its divisors is an integer number (5382637260).

Almost surely, 2120213231220 is an apocalyptic number.

120213231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120213231220 is an abundant number, since it is smaller than the sum of its proper divisors (138153357260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120213231220 is a wasteful number, since it uses less digits than its factorization.

120213231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25984 (or 25982 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 120213231220 its reverse (22132312021), we get a palindrome (142345543241).

The spelling of 120213231220 in words is "one hundred twenty billion, two hundred thirteen million, two hundred thirty-one thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 43 86 172 215 430 860 7643 15286 18289 30572 36578 38215 73156 76430 91445 152860 182890 328649 365780 657298 786427 1314596 1572854 1643245 3145708 3286490 3932135 6572980 7864270 15728540 139782827 279565654 559131308 698914135 1397828270 2795656540 6010661561 12021323122 24042646244 30053307805 60106615610 120213231220