31320321221223 has 12 divisors (see below), whose sum is σ = 45240536958760. Its totient is φ = 20880180467856.

The previous prime is 31320321221149. The next prime is 31320321221261. The reversal of 31320321221223 is 32212212302313.

31320321221223 is a `hidden beast` number, since 3 + 1 + 3 + 203 + 212 + 21 + 223 = 666.

It is not a de Polignac number, because 31320321221223 - 2⁹ = 31320321220711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320321225223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3935448 + ... + 8839026.

Almost surely, 2^{31320321221223} is an apocalyptic number.

31320321221223 is a deficient number, since it is larger than the sum of its proper divisors (13920215737537).

31320321221223 is a wasteful number, since it uses less digits than its factorization.

31320321221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5613278 (or 5613275 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 31320321221223 its reverse (32212212302313), we get a palindrome (63532533523536).

The spelling of 31320321221223 in words is "thirty-one trillion, three hundred twenty billion, three hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-three".