55120021032 has 32 divisors (see below), whose sum is σ = 138159866880. Its totient is φ = 18325365120.

The previous prime is 55120021007. The next prime is 55120021057. The reversal of 55120021032 is 23012002155.

It is an interprime number because it is at equal distance from previous prime (55120021007) and next prime (55120021057).

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, 2989069 + ... + 3007452.

It is an arithmetic number, because the mean of its divisors is an integer number (4317495840).

Almost surely, 2^55120021032 is an apocalyptic number.

It is an amenable number.

55120021032 is an abundant number, since it is smaller than the sum of its proper divisors (83039845848).

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

55120021032 is a wasteful number, since it uses less digits than its factorization.

55120021032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996913 (or 5996909 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 55120021032 its reverse (23012002155), we get a palindrome (78132023187).

The spelling of 55120021032 in words is "fifty-five billion, one hundred twenty million, twenty-one thousand, thirty-two".