12021212102021 has 4 divisors (see below), whose sum is σ = 12137922899232. Its totient is φ = 11904501304812.

The previous prime is 12021212101937. The next prime is 12021212102051. The reversal of 12021212102021 is 12020121212021.

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 a de Polignac number, because none of the positive numbers 2^k-12021212102021 is a prime.

It is a super-2 number, since 2×12021212102021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021212102051) 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, 58355398451 + ... + 58355398656.

It is an arithmetic number, because the mean of its divisors is an integer number (3034480724808).

Almost surely, 2^{12021212102021} is an apocalyptic number.

It is an amenable number.

12021212102021 is a deficient number, since it is larger than the sum of its proper divisors (116710797211).

12021212102021 is a wasteful number, since it uses less digits than its factorization.

12021212102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116710797210.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021212102021 its reverse (12020121212021), we get a palindrome (24041333314042).

The spelling of 12021212102021 in words is "twelve trillion, twenty-one billion, two hundred twelve million, one hundred two thousand, twenty-one".