31312221321201 has 16 divisors (see below), whose sum is σ = 41778623341824. Its totient is φ = 20860321382784.

The previous prime is 31312221321169. The next prime is 31312221321209. The reversal of 31312221321201 is 10212312221313.

It is not a de Polignac number, because 31312221321201 - 2⁵ = 31312221321169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31312221321209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26651496 + ... + 27801558.

It is an arithmetic number, because the mean of its divisors is an integer number (2611163958864).

Almost surely, 2^{31312221321201} is an apocalyptic number.

It is an amenable number.

31312221321201 is a deficient number, since it is larger than the sum of its proper divisors (10466402020623).

31312221321201 is a wasteful number, since it uses less digits than its factorization.

31312221321201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156360.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 31312221321201 its reverse (10212312221313), we get a palindrome (41524533542514).

The spelling of 31312221321201 in words is "thirty-one trillion, three hundred twelve billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred one".