31111123101102 has 48 divisors (see below), whose sum is σ = 73975713581952. Its totient is φ = 9371160278160.

The previous prime is 31111123101067. The next prime is 31111123101131. The reversal of 31111123101102 is 20110132111113.

31111123101102 is a `hidden beast` number, since 311 + 1 + 11 + 231 + 0 + 110 + 2 = 666.

It is a super-2 number, since 2×31111123101102² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 470406708 + ... + 470472839.

It is an arithmetic number, because the mean of its divisors is an integer number (1541160699624).

Almost surely, 2^{31111123101102} is an apocalyptic number.

31111123101102 is an abundant number, since it is smaller than the sum of its proper divisors (42864590480850).

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

31111123101102 is a wasteful number, since it uses less digits than its factorization.

31111123101102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940879733 (or 940879730 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 31111123101102 its reverse (20110132111113), we get a palindrome (51221255212215).

The spelling of 31111123101102 in words is "thirty-one trillion, one hundred eleven billion, one hundred twenty-three million, one hundred one thousand, one hundred two".