31001111112 has 32 divisors (see below), whose sum is σ = 78483830400. Its totient is φ = 10202896704.

The previous prime is 31001111111. The next prime is 31001111137. The reversal of 31001111112 is 21111110013.

It is a super-2 number, since 2×31001111112² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (31001111111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8173503 + ... + 8177294.

It is an arithmetic number, because the mean of its divisors is an integer number (2452619700).

Almost surely, 2^31001111112 is an apocalyptic number.

It is an amenable number.

31001111112 is an abundant number, since it is smaller than the sum of its proper divisors (47482719288).

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

31001111112 is a wasteful number, since it uses less digits than its factorization.

31001111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16350885 (or 16350881 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 31001111112 its reverse (21111110013), we get a palindrome (52112221125).

It can be divided in two parts, 310011 and 11112, that added together give a palindrome (321123).

The spelling of 31001111112 in words is "thirty-one billion, one million, one hundred eleven thousand, one hundred twelve".