31321222201312 has 48 divisors (see below), whose sum is σ = 62247240281520. Its totient is φ = 15512433553408.

The previous prime is 31321222201303. The next prime is 31321222201331. The reversal of 31321222201312 is 21310222212313.

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, 28945938 + ... + 30008494.

It is an arithmetic number, because the mean of its divisors is an integer number (1296817505865).

Almost surely, 2^{31321222201312} is an apocalyptic number.

31321222201312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31321222201312 is a deficient number, since it is larger than the sum of its proper divisors (30926018080208).

31321222201312 is a wasteful number, since it uses less digits than its factorization.

31321222201312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071283 (or 1071275 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31321222201312 its reverse (21310222212313), we get a palindrome (52631444413625).

The spelling of 31321222201312 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twenty-two million, two hundred one thousand, three hundred twelve".