31011003012 has 24 divisors (see below), whose sum is σ = 78937098912. Its totient is φ = 9397273600.

The previous prime is 31011002993. The next prime is 31011003019. The reversal of 31011003012 is 21030011013.

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 (31011003019) 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, 117465789 + ... + 117466052.

It is an arithmetic number, because the mean of its divisors is an integer number (3289045788).

Almost surely, 2^31011003012 is an apocalyptic number.

It is an amenable number.

31011003012 is an abundant number, since it is smaller than the sum of its proper divisors (47926095900).

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

31011003012 is a wasteful number, since it uses less digits than its factorization.

31011003012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234931859 (or 234931857 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 31011003012 its reverse (21030011013), we get a palindrome (52041014025).

The spelling of 31011003012 in words is "thirty-one billion, eleven million, three thousand, twelve".