123212031013 has 4 divisors (see below), whose sum is σ = 123213988800. Its totient is φ = 123210073228.

The previous prime is 123212030951. The next prime is 123212031023. The reversal of 123212031013 is 310130212321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 310130212321 = 1087 ⋅285308383.

It is a cyclic number.

It is not a de Polignac number, because 123212031013 - 2¹³ = 123212022821 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 (123212031023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881245 + ... + 1011442.

It is an arithmetic number, because the mean of its divisors is an integer number (30803497200).

Almost surely, 2^123212031013 is an apocalyptic number.

It is an amenable number.

123212031013 is a deficient number, since it is larger than the sum of its proper divisors (1957787).

123212031013 is an equidigital number, since it uses as much as digits as its factorization.

123212031013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957786.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 123212031013 its reverse (310130212321), we get a palindrome (433342243334).

The spelling of 123212031013 in words is "one hundred twenty-three billion, two hundred twelve million, thirty-one thousand, thirteen".