12402031013 has 4 divisors (see below), whose sum is σ = 12419723628. Its totient is φ = 12384338400.

The previous prime is 12402030983. The next prime is 12402031021. The reversal of 12402031013 is 31013020421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31013020421 = 49789 ⋅622889.

It can be written as a sum of positive squares in 2 ways, for example, as 10453426564 + 1948604449 = 102242^2 + 44143^2 .

It is a cyclic number.

It is not a de Polignac number, because 12402031013 - 2²² = 12397836709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12402030982 and 12402031000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402031513) 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, 8845256 + ... + 8846657.

It is an arithmetic number, because the mean of its divisors is an integer number (3104930907).

Almost surely, 2^12402031013 is an apocalyptic number.

It is an amenable number.

12402031013 is a deficient number, since it is larger than the sum of its proper divisors (17692615).

12402031013 is an equidigital number, since it uses as much as digits as its factorization.

12402031013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17692614.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12402031013 its reverse (31013020421), we get a palindrome (43415051434).

The spelling of 12402031013 in words is "twelve billion, four hundred two million, thirty-one thousand, thirteen".