31321222233312 has 96 divisors (see below), whose sum is σ = 89717303821824. Its totient is φ = 9488664345600.

The previous prime is 31321222233293. The next prime is 31321222233341. The reversal of 31321222233312 is 21333222212313.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 31321222233312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249973 + ... + 7918644.

It is an arithmetic number, because the mean of its divisors is an integer number (934555248144).

Almost surely, 2^{31321222233312} is an apocalyptic number.

31321222233312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31321222233312 is an abundant number, since it is smaller than the sum of its proper divisors (58396081588512).

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

31321222233312 is a wasteful number, since it uses less digits than its factorization.

31321222233312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8172272 (or 8172264 counting only the distinct ones).

The product of its digits is 15552, while the sum is 30.

Adding to 31321222233312 its reverse (21333222212313), we get a palindrome (52654444445625).

The spelling of 31321222233312 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twenty-two million, two hundred thirty-three thousand, three hundred twelve".