321012123013 has 4 divisors (see below), whose sum is σ = 321013331500. Its totient is φ = 321010914528.

The previous prime is 321012123007. The next prime is 321012123017. The reversal of 321012123013 is 310321210123.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 310321210123 = 41 ⋅7568810003.

It can be written as a sum of positive squares in 2 ways, for example, as 257355319204 + 63656803809 = 507302^2 + 252303^2 .

It is a cyclic number.

It is not a de Polignac number, because 321012123013 - 2³⁷ = 183573169541 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 (321012123017) 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, 12870 + ... + 801367.

It is an arithmetic number, because the mean of its divisors is an integer number (80253332875).

Almost surely, 2^321012123013 is an apocalyptic number.

It is an amenable number.

321012123013 is a deficient number, since it is larger than the sum of its proper divisors (1208487).

321012123013 is an equidigital number, since it uses as much as digits as its factorization.

321012123013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208486.

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

Adding to 321012123013 its reverse (310321210123), we get a palindrome (631333333136).

The spelling of 321012123013 in words is "three hundred twenty-one billion, twelve million, one hundred twenty-three thousand, thirteen".