31001210012 has 12 divisors (see below), whose sum is σ = 54261647160. Its totient is φ = 15497882256.

The previous prime is 31001210003. The next prime is 31001210057. The reversal of 31001210012 is 21001210013.

It is a super-2 number, since 2×31001210012² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31001209975 and 31001210002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654962 + ... + 700697.

It is an arithmetic number, because the mean of its divisors is an integer number (4521803930).

Almost surely, 2^31001210012 is an apocalyptic number.

It is an amenable number.

31001210012 is a deficient number, since it is larger than the sum of its proper divisors (23260437148).

31001210012 is a wasteful number, since it uses less digits than its factorization.

31001210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361380 (or 1361378 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 31001210012 its reverse (21001210013), we get a palindrome (52002420025).

Subtracting from 31001210012 its reverse (21001210013), we obtain a palindrome (9999999999).

The spelling of 31001210012 in words is "thirty-one billion, one million, two hundred ten thousand, twelve".