922211212221 has 32 divisors (see below), whose sum is σ = 1474526000640. Its totient is φ = 566283441600.

The previous prime is 922211212163. The next prime is 922211212243. The reversal of 922211212221 is 122212112229.

922211212221 is a `hidden beast` number, since 9 + 2 + 221 + 1 + 212 + 221 = 666.

It is not a de Polignac number, because 922211212221 - 2⁷ = 922211212093 is a prime.

It is a super-2 number, since 2×922211212221² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (922211212261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2687845 + ... + 3011466.

It is an arithmetic number, because the mean of its divisors is an integer number (46078937520).

Almost surely, 2^922211212221 is an apocalyptic number.

It is an amenable number.

922211212221 is a deficient number, since it is larger than the sum of its proper divisors (552314788419).

922211212221 is a wasteful number, since it uses less digits than its factorization.

922211212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5699794 (or 5699788 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The spelling of 922211212221 in words is "nine hundred twenty-two billion, two hundred eleven million, two hundred twelve thousand, two hundred twenty-one".