31121112102 has 64 divisors (see below), whose sum is σ = 64822886400. Its totient is φ = 9949975200.

The previous prime is 31121112097. The next prime is 31121112107. The reversal of 31121112102 is 20121112113.

It is an interprime number because it is at equal distance from previous prime (31121112097) and next prime (31121112107).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121112107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10473477 + ... + 10476447.

It is an arithmetic number, because the mean of its divisors is an integer number (1012857600).

Almost surely, 2^31121112102 is an apocalyptic number.

31121112102 is an abundant number, since it is smaller than the sum of its proper divisors (33701774298).

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

31121112102 is a wasteful number, since it uses less digits than its factorization.

31121112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3489.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 31121112102 its reverse (20121112113), we get a palindrome (51242224215).

The spelling of 31121112102 in words is "thirty-one billion, one hundred twenty-one million, one hundred twelve thousand, one hundred two".