12021204313 has 4 divisors (see below), whose sum is σ = 12300767248. Its totient is φ = 11741641380.

The previous prime is 12021204287. The next prime is 12021204319. The reversal of 12021204313 is 31340212021.

It is a happy number.

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: 31340212021 = 127 ⋅246773323.

It is a cyclic number.

It is not a de Polignac number, because 12021204313 - 2¹⁷ = 12021073241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021204319) 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, 139781403 + ... + 139781488.

It is an arithmetic number, because the mean of its divisors is an integer number (3075191812).

Almost surely, 2^12021204313 is an apocalyptic number.

It is an amenable number.

12021204313 is a deficient number, since it is larger than the sum of its proper divisors (279562935).

12021204313 is an equidigital number, since it uses as much as digits as its factorization.

12021204313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279562934.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12021204313 its reverse (31340212021), we get a palindrome (43361416334).

The spelling of 12021204313 in words is "twelve billion, twenty-one million, two hundred four thousand, three hundred thirteen".