31313211331201 has 4 divisors (see below), whose sum is σ = 31313300620804. Its totient is φ = 31313122041600.

The previous prime is 31313211331177. The next prime is 31313211331231. The reversal of 31313211331201 is 10213311231313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12410507351025 + 18902703980176 = 3522855^2 + 4347724^2 .

It is a cyclic number.

It is not a de Polignac number, because 31313211331201 - 2⁵ = 31313211331169 is a prime.

It is a super-2 number, since 2×31313211331201² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313211331231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44116680 + ... + 44820841.

It is an arithmetic number, because the mean of its divisors is an integer number (7828325155201).

Almost surely, 2^{31313211331201} is an apocalyptic number.

It is an amenable number.

31313211331201 is a deficient number, since it is larger than the sum of its proper divisors (89289603).

31313211331201 is an equidigital number, since it uses as much as digits as its factorization.

31313211331201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89289602.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31313211331201 its reverse (10213311231313), we get a palindrome (41526522562514).

The spelling of 31313211331201 in words is "thirty-one trillion, three hundred thirteen billion, two hundred eleven million, three hundred thirty-one thousand, two hundred one".