123031012313 has 4 divisors (see below), whose sum is σ = 134215649808. Its totient is φ = 111846374820.

The previous prime is 123031012249. The next prime is 123031012331. The reversal of 123031012313 is 313210130321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123031012313 - 2⁶ = 123031012249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123031012393) 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, 5592318731 + ... + 5592318752.

It is an arithmetic number, because the mean of its divisors is an integer number (33553912452).

Almost surely, 2^123031012313 is an apocalyptic number.

It is an amenable number.

123031012313 is a deficient number, since it is larger than the sum of its proper divisors (11184637495).

123031012313 is a wasteful number, since it uses less digits than its factorization.

123031012313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11184637494.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 123031012313 its reverse (313210130321), we get a palindrome (436241142634).

The spelling of 123031012313 in words is "one hundred twenty-three billion, thirty-one million, twelve thousand, three hundred thirteen".