12220112021021 has 4 divisors (see below), whose sum is σ = 12220120368000. Its totient is φ = 12220103674044.

The previous prime is 12220112020997. The next prime is 12220112021023. The reversal of 12220112021021 is 12012021102221.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12220112021021 - 2⁶ = 12220112020957 is a prime.

It is a super-2 number, since 2×12220112021021² (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 (12220112021023) 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, 1333091 + ... + 5120288.

It is an arithmetic number, because the mean of its divisors is an integer number (3055030092000).

Almost surely, 2^{12220112021021} is an apocalyptic number.

It is an amenable number.

12220112021021 is a deficient number, since it is larger than the sum of its proper divisors (8346979).

12220112021021 is an equidigital number, since it uses as much as digits as its factorization.

12220112021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8346978.

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

Adding to 12220112021021 its reverse (12012021102221), we get a palindrome (24232133123242).

The spelling of 12220112021021 in words is "twelve trillion, two hundred twenty billion, one hundred twelve million, twenty-one thousand, twenty-one".