31323224361212 has 24 divisors (see below), whose sum is σ = 62730764307456. Its totient is φ = 13406171386608.

The previous prime is 31323224361199. The next prime is 31323224361257. The reversal of 31323224361212 is 21216342232313.

It is a super-2 number, since 2×31323224361212² (a number of 28 digits) contains 22 as substring.

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, 752796548 + ... + 752838155.

It is an arithmetic number, because the mean of its divisors is an integer number (2613781846144).

Almost surely, 2^{31323224361212} is an apocalyptic number.

It is an amenable number.

31323224361212 is an abundant number, since it is smaller than the sum of its proper divisors (31407539946244).

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

31323224361212 is a wasteful number, since it uses less digits than its factorization.

31323224361212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505635457 (or 1505635455 counting only the distinct ones).

The product of its digits is 62208, while the sum is 35.

Adding to 31323224361212 its reverse (21216342232313), we get a palindrome (52539566593525).

The spelling of 31323224361212 in words is "thirty-one trillion, three hundred twenty-three billion, two hundred twenty-four million, three hundred sixty-one thousand, two hundred twelve".