51100120120 has 64 divisors (see below), whose sum is σ = 133361556480. Its totient is φ = 17258541696.

The previous prime is 51100120111. The next prime is 51100120151. The reversal of 51100120120 is 2102100115.

It is a super-2 number, since 2×51100120120² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51100120120.

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, 1343184 + ... + 1380703.

It is an arithmetic number, because the mean of its divisors is an integer number (2083774320).

Almost surely, 2^51100120120 is an apocalyptic number.

It is an amenable number.

51100120120 is an abundant number, since it is smaller than the sum of its proper divisors (82261436360).

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

51100120120 is a wasteful number, since it uses less digits than its factorization.

51100120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723972 (or 2723968 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

Adding to 51100120120 its reverse (2102100115), we get a palindrome (53202220235).

The spelling of 51100120120 in words is "fifty-one billion, one hundred million, one hundred twenty thousand, one hundred twenty".