31120022211100 has 72 divisors (see below), whose sum is σ = 67924500553728. Its totient is φ = 12375581572800.

The previous prime is 31120022211073. The next prime is 31120022211119. The reversal of 31120022211100 is 111222002113.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10604977 + ... + 13217623.

It is an arithmetic number, because the mean of its divisors is an integer number (943395841024).

Almost surely, 2^{31120022211100} is an apocalyptic number.

It is an amenable number.

31120022211100 is an abundant number, since it is smaller than the sum of its proper divisors (36804478342628).

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

31120022211100 is a wasteful number, since it uses less digits than its factorization.

31120022211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613355 (or 2613348 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31120022211100 its reverse (111222002113), we get a palindrome (31231244213213).

The spelling of 31120022211100 in words is "thirty-one trillion, one hundred twenty billion, twenty-two million, two hundred eleven thousand, one hundred".