12000021313 has 4 divisors (see below), whose sum is σ = 13714310080. Its totient is φ = 10285732548.

The previous prime is 12000021301. The next prime is 12000021317. The reversal of 12000021313 is 31312000021.

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: 31312000021 = 43 ⋅728186047.

It is not a de Polignac number, because 12000021313 - 2⁵ = 12000021281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000021293 and 12000021302.

It is not an unprimeable number, because it can be changed into a prime (12000021317) 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, 857144373 + ... + 857144386.

It is an arithmetic number, because the mean of its divisors is an integer number (3428577520).

Almost surely, 2^12000021313 is an apocalyptic number.

It is an amenable number.

12000021313 is a deficient number, since it is larger than the sum of its proper divisors (1714288767).

12000021313 is an equidigital number, since it uses as much as digits as its factorization.

12000021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714288766.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 12000021313 its reverse (31312000021), we get a palindrome (43312021334).

It can be divided in two parts, 12000021 and 313, that multiplied together give a palindrome (3756006573).

The spelling of 12000021313 in words is "twelve billion, twenty-one thousand, three hundred thirteen".