31321122213212 has 12 divisors (see below), whose sum is σ = 59028268786536. Its totient is φ = 14455902559920.

The previous prime is 31321122213187. The next prime is 31321122213287. The reversal of 31321122213212 is 21231222112313.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 301164636614 + ... + 301164636717.

It is an arithmetic number, because the mean of its divisors is an integer number (4919022398878).

Almost surely, 2^{31321122213212} is an apocalyptic number.

It is an amenable number.

31321122213212 is a deficient number, since it is larger than the sum of its proper divisors (27707146573324).

31321122213212 is a wasteful number, since it uses less digits than its factorization.

31321122213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602329273348 (or 602329273346 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

Adding to 31321122213212 its reverse (21231222112313), we get a palindrome (52552344325525).

The spelling of 31321122213212 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred twenty-two million, two hundred thirteen thousand, two hundred twelve".