123031201013 has 6 divisors (see below), whose sum is σ = 143117927766. Its totient is φ = 105455315112.

The previous prime is 123031200997. The next prime is 123031201031. The reversal of 123031201013 is 310102130321.

It can be written as a sum of positive squares in only one way, i.e., 93151312849 + 29879888164 = 305207^2 + 172858^2 .

It is not a de Polignac number, because 123031201013 - 2⁴ = 123031200997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123031200982 and 123031201000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123031201213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1255420370 + ... + 1255420467.

It is an arithmetic number, because the mean of its divisors is an integer number (23852987961).

Almost surely, 2^123031201013 is an apocalyptic number.

It is an amenable number.

123031201013 is a deficient number, since it is larger than the sum of its proper divisors (20086726753).

123031201013 is an equidigital number, since it uses as much as digits as its factorization.

123031201013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510840851 (or 2510840844 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 123031201013 its reverse (310102130321), we get a palindrome (433133331334).

The spelling of 123031201013 in words is "one hundred twenty-three billion, thirty-one million, two hundred one thousand, thirteen".