222122002000021 has 12 divisors (see below), whose sum is σ = 232331829964108. Its totient is φ = 212343322238784.

The previous prime is 222122002000001. The next prime is 222122002000057. The reversal of 222122002000021 is 120000200221222.

It can be written as a sum of positive squares in 2 ways, for example, as 100103246635921 + 122018755364100 = 10005161^2 + 11046210^2 .

It is not a de Polignac number, because 222122002000021 - 2²⁵ = 222121968445589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222122001999959 and 222122002000004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222122002000001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118836030 + ... + 120690703.

Almost surely, 2^{222122002000021} is an apocalyptic number.

It is an amenable number.

222122002000021 is a deficient number, since it is larger than the sum of its proper divisors (10209827964087).

222122002000021 is a wasteful number, since it uses less digits than its factorization.

222122002000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239528532 (or 239528509 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 222122002000021 its reverse (120000200221222), we get a palindrome (342122202221243).

The spelling of 222122002000021 in words is "two hundred twenty-two trillion, one hundred twenty-two billion, two million, twenty-one", and thus it is an aban number.