12021133213 has 4 divisors (see below), whose sum is σ = 12057451168. Its totient is φ = 11984815260.

The previous prime is 12021133207. The next prime is 12021133219. The reversal of 12021133213 is 31233112021.

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: 31233112021 = 9829 ⋅3177649.

It is an interprime number because it is at equal distance from previous prime (12021133207) and next prime (12021133219).

It is a cyclic number.

It is not a de Polignac number, because 12021133213 - 2²⁹ = 11484262301 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 (12021133219) 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, 18158481 + ... + 18159142.

It is an arithmetic number, because the mean of its divisors is an integer number (3014362792).

Almost surely, 2^12021133213 is an apocalyptic number.

It is an amenable number.

12021133213 is a deficient number, since it is larger than the sum of its proper divisors (36317955).

12021133213 is an equidigital number, since it uses as much as digits as its factorization.

12021133213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36317954.

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

Adding to 12021133213 its reverse (31233112021), we get a palindrome (43254245234).

The spelling of 12021133213 in words is "twelve billion, twenty-one million, one hundred thirty-three thousand, two hundred thirteen".