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20120321222 = 2412239109589
BaseRepresentation
bin10010101111010000…
…111011110011000110
31220221012221012221022
4102233100323303012
5312201300234342
613124304151142
71311412623431
oct225720736306
956835835838
1020120321222
118595440151
123a963084b2
131b885b4b21
14d8c286818
157cb5d69d2
hex4af43bcc6

20120321222 has 16 divisors (see below), whose sum is σ = 30930681600. Its totient is φ = 9810317760.

The previous prime is 20120321209. The next prime is 20120321231. The reversal of 20120321222 is 22212302102.

It is a self number, because there is not a number n which added to its sum of digits gives 20120321222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128804 + ... + 238392.

It is an arithmetic number, because the mean of its divisors is an integer number (1933167600).

Almost surely, 220120321222 is an apocalyptic number.

20120321222 is a deficient number, since it is larger than the sum of its proper divisors (10810360378).

20120321222 is a wasteful number, since it uses less digits than its factorization.

20120321222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111871.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20120321222 its reverse (22212302102), we get a palindrome (42332623324).

The spelling of 20120321222 in words is "twenty billion, one hundred twenty million, three hundred twenty-one thousand, two hundred twenty-two".

Divisors: 1 2 41 82 2239 4478 91799 109589 183598 219178 4493149 8986298 245369771 490739542 10060160611 20120321222