222202212021 has 24 divisors (see below), whose sum is σ = 331852990976. Its totient is φ = 143122295520.

The previous prime is 222202212017. The next prime is 222202212031. The reversal of 222202212021 is 120212202222.

222202212021 is a `hidden beast` number, since 22 + 220 + 221 + 202 + 1 = 666.

It is not a de Polignac number, because 222202212021 - 2² = 222202212017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222202211985 and 222202212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222202212031) 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, 478585 + ... + 820638.

Almost surely, 2^222202212021 is an apocalyptic number.

It is an amenable number.

222202212021 is a deficient number, since it is larger than the sum of its proper divisors (109650778955).

222202212021 is a wasteful number, since it uses less digits than its factorization.

222202212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299873 (or 1299870 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 222202212021 its reverse (120212202222), we get a palindrome (342414414243).

The spelling of 222202212021 in words is "two hundred twenty-two billion, two hundred two million, two hundred twelve thousand, twenty-one".