55121153312 has 48 divisors (see below), whose sum is σ = 112389887232. Its totient is φ = 26594211840.

The previous prime is 55121153299. The next prime is 55121153357. The reversal of 55121153312 is 21335112155.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151313 + ... + 364880.

It is an arithmetic number, because the mean of its divisors is an integer number (2341455984).

Almost surely, 2^55121153312 is an apocalyptic number.

It is an amenable number.

55121153312 is an abundant number, since it is smaller than the sum of its proper divisors (57268733920).

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

55121153312 is a wasteful number, since it uses less digits than its factorization.

55121153312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516321 (or 516313 counting only the distinct ones).

The product of its digits is 4500, while the sum is 29.

Adding to 55121153312 its reverse (21335112155), we get a palindrome (76456265467).

The spelling of 55121153312 in words is "fifty-five billion, one hundred twenty-one million, one hundred fifty-three thousand, three hundred twelve".