31020000013212 has 24 divisors (see below), whose sum is σ = 82720000035456. Its totient is φ = 8862857146608.

The previous prime is 31020000013139. The next prime is 31020000013231. The reversal of 31020000013212 is 21231000002013.

It is a junction number, because it is equal to n+sod(n) for n = 31020000013191 and 31020000013200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184642857138 + ... + 184642857305.

It is an arithmetic number, because the mean of its divisors is an integer number (3446666668144).

Almost surely, 2^{31020000013212} is an apocalyptic number.

It is an amenable number.

31020000013212 is an abundant number, since it is smaller than the sum of its proper divisors (51700000022244).

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

31020000013212 is a wasteful number, since it uses less digits than its factorization.

31020000013212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369285714457 (or 369285714455 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31020000013212 its reverse (21231000002013), we get a palindrome (52251000015225).

The spelling of 31020000013212 in words is "thirty-one trillion, twenty billion, thirteen thousand, two hundred twelve".