31320322221213 has 64 divisors (see below), whose sum is σ = 47149420032000. Its totient is φ = 20543956076160.

The previous prime is 31320322221211. The next prime is 31320322221257. The reversal of 31320322221213 is 31212222302313.

31320322221213 is a `hidden beast` number, since 3 + 1 + 3 + 203 + 22 + 221 + 213 = 666.

It is not a de Polignac number, because 31320322221213 - 2¹ = 31320322221211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320322221211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9080984713 + ... + 9080988161.

It is an arithmetic number, because the mean of its divisors is an integer number (736709688000).

Almost surely, 2^{31320322221213} is an apocalyptic number.

It is an amenable number.

31320322221213 is a deficient number, since it is larger than the sum of its proper divisors (15829097810787).

31320322221213 is a wasteful number, since it uses less digits than its factorization.

31320322221213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8079 (or 8073 counting only the distinct ones).

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

Adding to 31320322221213 its reverse (31212222302313), we get a palindrome (62532544523526).

The spelling of 31320322221213 in words is "thirty-one trillion, three hundred twenty billion, three hundred twenty-two million, two hundred twenty-one thousand, two hundred thirteen".