55123112113220 has 48 divisors (see below), whose sum is σ = 123532962416640. Its totient is φ = 20588827037184.

The previous prime is 55123112113109. The next prime is 55123112113241. The reversal of 55123112113220 is 2231121132155.

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, 638251310 + ... + 638337669.

It is an arithmetic number, because the mean of its divisors is an integer number (2573603383680).

Almost surely, 2^{55123112113220} is an apocalyptic number.

It is an amenable number.

55123112113220 is an abundant number, since it is smaller than the sum of its proper divisors (68409850303420).

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

55123112113220 is a wasteful number, since it uses less digits than its factorization.

55123112113220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276589132 (or 1276589130 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 55123112113220 its reverse (2231121132155), we get a palindrome (57354233245375).

The spelling of 55123112113220 in words is "fifty-five trillion, one hundred twenty-three billion, one hundred twelve million, one hundred thirteen thousand, two hundred twenty".