31103201213112 has 64 divisors (see below), whose sum is σ = 89011258951680. Its totient is φ = 8872131940992.

The previous prime is 31103201213111. The next prime is 31103201213141. The reversal of 31103201213112 is 21131210230113.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103201213111) 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, 150906888 + ... + 151112855.

It is an arithmetic number, because the mean of its divisors is an integer number (1390800921120).

Almost surely, 2^{31103201213112} is an apocalyptic number.

It is an amenable number.

31103201213112 is an abundant number, since it is smaller than the sum of its proper divisors (57908057738568).

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

31103201213112 is a wasteful number, since it uses less digits than its factorization.

31103201213112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302020372 (or 302020368 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31103201213112 its reverse (21131210230113), we get a palindrome (52234411443225).

The spelling of 31103201213112 in words is "thirty-one trillion, one hundred three billion, two hundred one million, two hundred thirteen thousand, one hundred twelve".