12021021023021 has 4 divisors (see below), whose sum is σ = 12026748048000. Its totient is φ = 12015293998044.

The previous prime is 12021021022991. The next prime is 12021021023107. The reversal of 12021021023021 is 12032012012021.

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.

It is a cyclic number.

It is not a de Polignac number, because 12021021023021 - 2²⁶ = 12020953914157 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 (12021021023521) 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, 2863509341 + ... + 2863513538.

It is an arithmetic number, because the mean of its divisors is an integer number (3006687012000).

Almost surely, 2^{12021021023021} is an apocalyptic number.

It is an amenable number.

12021021023021 is a deficient number, since it is larger than the sum of its proper divisors (5727024979).

12021021023021 is an equidigital number, since it uses as much as digits as its factorization.

12021021023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5727024978.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12021021023021 its reverse (12032012012021), we get a palindrome (24053033035042).

The spelling of 12021021023021 in words is "twelve trillion, twenty-one billion, twenty-one million, twenty-three thousand, twenty-one".