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120806061220 = 22513716544207
BaseRepresentation
bin111000010000010011…
…0100011010010100100
3102112211011220202121201
41300200212203102210
53434402322424340
6131255245052244
711504454402055
oct1604046432244
9375734822551
10120806061220
1147262965919
121b4b5857084
13b5131b0080
145bc040c72c
153220b2879a
hex1c209a34a4

120806061220 has 48 divisors (see below), whose sum is σ = 277055589888. Its totient is φ = 43977064320.

The previous prime is 120806061217. The next prime is 120806061239. The reversal of 120806061220 is 22160608021.

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, 3253644 + ... + 3290563.

It is an arithmetic number, because the mean of its divisors is an integer number (5771991456).

Almost surely, 2120806061220 is an apocalyptic number.

120806061220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120806061220 is an abundant number, since it is smaller than the sum of its proper divisors (156249528668).

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

120806061220 is a wasteful number, since it uses less digits than its factorization.

120806061220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6544300 (or 6544298 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 120806061220 its reverse (22160608021), we get a palindrome (142966669241).

The spelling of 120806061220 in words is "one hundred twenty billion, eight hundred six million, sixty-one thousand, two hundred twenty".

Divisors: 1 2 4 5 10 13 20 26 52 65 71 130 142 260 284 355 710 923 1420 1846 3692 4615 9230 18460 6544207 13088414 26176828 32721035 65442070 85074691 130884140 170149382 340298764 425373455 464638697 850746910 929277394 1701493820 1858554788 2323193485 4646386970 6040303061 9292773940 12080606122 24161212244 30201515305 60403030610 120806061220