222120002012021 has 4 divisors (see below), whose sum is σ = 231777393403872. Its totient is φ = 212462610620172.

The previous prime is 222120002011993. The next prime is 222120002012071. The reversal of 222120002012021 is 120210200021222.

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.

It is a cyclic number.

It is not a de Polignac number, because 222120002012021 - 2³⁴ = 222102822142837 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 (222120002012071) 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, 4828695695891 + ... + 4828695695936.

It is an arithmetic number, because the mean of its divisors is an integer number (57944348350968).

Almost surely, 2^{222120002012021} is an apocalyptic number.

It is an amenable number.

222120002012021 is a deficient number, since it is larger than the sum of its proper divisors (9657391391851).

222120002012021 is an equidigital number, since it uses as much as digits as its factorization.

222120002012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9657391391850.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222120002012021 its reverse (120210200021222), we get a palindrome (342330202033243).

The spelling of 222120002012021 in words is "two hundred twenty-two trillion, one hundred twenty billion, two million, twelve thousand, twenty-one".