222112221010021 has 4 divisors (see below), whose sum is σ = 222202547251200. Its totient is φ = 222021894768844.

The previous prime is 222112221010007. The next prime is 222112221010061. The reversal of 222112221010021 is 120010122211222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222112221010021 - 2¹⁷ = 222112220878949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222112221010061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45163116901 + ... + 45163121818.

It is an arithmetic number, because the mean of its divisors is an integer number (55550636812800).

Almost surely, 2^{222112221010021} is an apocalyptic number.

It is an amenable number.

222112221010021 is a deficient number, since it is larger than the sum of its proper divisors (90326241179).

222112221010021 is an equidigital number, since it uses as much as digits as its factorization.

222112221010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90326241178.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 222112221010021 its reverse (120010122211222), we get a palindrome (342122343221243).

The spelling of 222112221010021 in words is "two hundred twenty-two trillion, one hundred twelve billion, two hundred twenty-one million, ten thousand, twenty-one".