212022002121 has 4 divisors (see below), whose sum is σ = 282696002832. Its totient is φ = 141348001412.

The previous prime is 212022002111. The next prime is 212022002123. The reversal of 212022002121 is 121200220212.

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 212022002121 - 2⁵ = 212022002089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212022002121.

It is not an unprimeable number, because it can be changed into a prime (212022002123) 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, 35337000351 + ... + 35337000356.

It is an arithmetic number, because the mean of its divisors is an integer number (70674000708).

Almost surely, 2^212022002121 is an apocalyptic number.

It is an amenable number.

212022002121 is a deficient number, since it is larger than the sum of its proper divisors (70674000711).

212022002121 is an equidigital number, since it uses as much as digits as its factorization.

212022002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70674000710.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212022002121 its reverse (121200220212), we get a palindrome (333222222333).

The spelling of 212022002121 in words is "two hundred twelve billion, twenty-two million, two thousand, one hundred twenty-one".