31023103113112 has 64 divisors (see below), whose sum is σ = 64242556963200. Its totient is φ = 13926811933440.

The previous prime is 31023103113097. The next prime is 31023103113113. The reversal of 31023103113112 is 21131130132013.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023103113113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20970283 + ... + 22400869.

It is an arithmetic number, because the mean of its divisors is an integer number (1003789952550).

Almost surely, 2^{31023103113112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31023103113112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32121278481600).

31023103113112 is an abundant number, since it is smaller than the sum of its proper divisors (33219453850088).

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

31023103113112 is a wasteful number, since it uses less digits than its factorization.

31023103113112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433656 (or 1433652 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31023103113112 its reverse (21131130132013), we get a palindrome (52154233245125).

The spelling of 31023103113112 in words is "thirty-one trillion, twenty-three billion, one hundred three million, one hundred thirteen thousand, one hundred twelve".