123033312013 has 4 divisors (see below), whose sum is σ = 126358536700. Its totient is φ = 119708087328.

The previous prime is 123033312011. The next prime is 123033312041. The reversal of 123033312013 is 310213330321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310213330321 = 107 ⋅2899190003.

It can be written as a sum of positive squares in 2 ways, for example, as 59769492484 + 63263819529 = 244478^2 + 251523^2 .

It is a cyclic number.

It is not a de Polignac number, because 123033312013 - 2¹ = 123033312011 is a prime.

It is a super-2 number, since 2×123033312013² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123033312011) 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, 1662612288 + ... + 1662612361.

It is an arithmetic number, because the mean of its divisors is an integer number (31589634175).

Almost surely, 2^123033312013 is an apocalyptic number.

It is an amenable number.

123033312013 is a deficient number, since it is larger than the sum of its proper divisors (3325224687).

123033312013 is an equidigital number, since it uses as much as digits as its factorization.

123033312013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325224686.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 123033312013 its reverse (310213330321), we get a palindrome (433246642334).

The spelling of 123033312013 in words is "one hundred twenty-three billion, thirty-three million, three hundred twelve thousand, thirteen".