31301222012113 has 4 divisors (see below), whose sum is σ = 31303178232228. Its totient is φ = 31299265792000.

The previous prime is 31301222012041. The next prime is 31301222012147. The reversal of 31301222012113 is 31121022210313.

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 16874078349249 + 14427143662864 = 4107807^2 + 3798308^2 .

It is a cyclic number.

It is not a de Polignac number, because 31301222012113 - 2⁹ = 31301222011601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31301222012153) 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, 978086056 + ... + 978118057.

It is an arithmetic number, because the mean of its divisors is an integer number (7825794558057).

Almost surely, 2^{31301222012113} is an apocalyptic number.

It is an amenable number.

31301222012113 is a deficient number, since it is larger than the sum of its proper divisors (1956220115).

31301222012113 is a wasteful number, since it uses less digits than its factorization.

31301222012113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956220114.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31301222012113 its reverse (31121022210313), we get a palindrome (62422244222426).

The spelling of 31301222012113 in words is "thirty-one trillion, three hundred one billion, two hundred twenty-two million, twelve thousand, one hundred thirteen".