212022222212221 has 4 divisors (see below), whose sum is σ = 223181286539200. Its totient is φ = 200863157885244.

The previous prime is 212022222212149. The next prime is 212022222212231. The reversal of 212022222212221 is 122212222220212.

212022222212221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212022222212221 - 2²⁵ = 212022188657789 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 (212022222212231) 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, 5579532163461 + ... + 5579532163498.

It is an arithmetic number, because the mean of its divisors is an integer number (55795321634800).

Almost surely, 2^{212022222212221} is an apocalyptic number.

It is an amenable number.

212022222212221 is a deficient number, since it is larger than the sum of its proper divisors (11159064326979).

212022222212221 is a wasteful number, since it uses less digits than its factorization.

212022222212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11159064326978.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 212022222212221 its reverse (122212222220212), we get a palindrome (334234444432433).

The spelling of 212022222212221 in words is "two hundred twelve trillion, twenty-two billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".