222102212210021 has 16 divisors (see below), whose sum is σ = 260990452537920. Its totient is φ = 186337205742720.

The previous prime is 222102212209981. The next prime is 222102212210051. The reversal of 222102212210021 is 120012212201222.

It is a cyclic number.

It is not a de Polignac number, because 222102212210021 - 2³⁸ = 221827334303077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222102212209975 and 222102212210002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222102212210051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175504955 + ... + 176765928.

It is an arithmetic number, because the mean of its divisors is an integer number (16311903283620).

Almost surely, 2^{222102212210021} is an apocalyptic number.

It is an amenable number.

222102212210021 is a deficient number, since it is larger than the sum of its proper divisors (38888240327899).

222102212210021 is a wasteful number, since it uses less digits than its factorization.

222102212210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352275316.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222102212210021 its reverse (120012212201222), we get a palindrome (342114424411243).

The spelling of 222102212210021 in words is "two hundred twenty-two trillion, one hundred two billion, two hundred twelve million, two hundred ten thousand, twenty-one".