222222110010021 has 24 divisors (see below), whose sum is σ = 350781427682400. Its totient is φ = 134444199621600.

The previous prime is 222222110009993. The next prime is 222222110010029. The reversal of 222222110010021 is 120010011222222.

It is a happy number.

222222110010021 is a `hidden beast` number, since 2 + 222 + 221 + 100 + 100 + 21 = 666.

It is not a de Polignac number, because 222222110010021 - 2⁹ = 222222110009509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222222110009976 and 222222110010003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222222110010029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1965501946 + ... + 1965615003.

It is an arithmetic number, because the mean of its divisors is an integer number (14615892820100).

Almost surely, 2^{222222110010021} is an apocalyptic number.

It is an amenable number.

222222110010021 is a deficient number, since it is larger than the sum of its proper divisors (128559317672379).

222222110010021 is a wasteful number, since it uses less digits than its factorization.

222222110010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931117537 (or 3931117534 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222222110010021 its reverse (120010011222222), we get a palindrome (342232121232243).

The spelling of 222222110010021 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one hundred ten million, ten thousand, twenty-one".