31102232021212 has 24 divisors (see below), whose sum is σ = 61958596597632. Its totient is φ = 13522709574000.

The previous prime is 31102232021171. The next prime is 31102232021297. The reversal of 31102232021212 is 21212023220113.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 15366714414 + ... + 15366716437.

It is an arithmetic number, because the mean of its divisors is an integer number (2581608191568).

Almost surely, 2^{31102232021212} is an apocalyptic number.

It is an amenable number.

31102232021212 is a deficient number, since it is larger than the sum of its proper divisors (30856364576420).

31102232021212 is a wasteful number, since it uses less digits than its factorization.

31102232021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30733430889 (or 30733430887 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31102232021212 its reverse (21212023220113), we get a palindrome (52314255241325).

The spelling of 31102232021212 in words is "thirty-one trillion, one hundred two billion, two hundred thirty-two million, twenty-one thousand, two hundred twelve".