31123101300013 has 4 divisors (see below), whose sum is σ = 31123424850588. Its totient is φ = 31122777749440.

The previous prime is 31123101299999. The next prime is 31123101300029. The reversal of 31123101300013 is 31000310132113.

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 26926167255849 + 4196934044164 = 5189043^2 + 2048642^2 .

It is a cyclic number.

It is not a de Polignac number, because 31123101300013 - 2⁵ = 31123101299981 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 (31123101300043) 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, 161630956 + ... + 161823397.

It is an arithmetic number, because the mean of its divisors is an integer number (7780856212647).

Almost surely, 2^{31123101300013} is an apocalyptic number.

It is an amenable number.

31123101300013 is a deficient number, since it is larger than the sum of its proper divisors (323550575).

31123101300013 is an equidigital number, since it uses as much as digits as its factorization.

31123101300013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323550574.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31123101300013 its reverse (31000310132113), we get a palindrome (62123411432126).

The spelling of 31123101300013 in words is "thirty-one trillion, one hundred twenty-three billion, one hundred one million, three hundred thousand, thirteen".