222021312989 has 4 divisors (see below), whose sum is σ = 253738643424. Its totient is φ = 190303982556.

The previous prime is 222021312937. The next prime is 222021312991. The reversal of 222021312989 is 989213120222.

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, and also an emirpimes, since its reverse is a distinct semiprime: 989213120222 = 2 ⋅494606560111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222021312989 is a prime.

It is a super-2 number, since 2×222021312989² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222021312089) 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, 15858665207 + ... + 15858665220.

It is an arithmetic number, because the mean of its divisors is an integer number (63434660856).

Almost surely, 2^222021312989 is an apocalyptic number.

It is an amenable number.

222021312989 is a deficient number, since it is larger than the sum of its proper divisors (31717330435).

222021312989 is an equidigital number, since it uses as much as digits as its factorization.

222021312989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31717330434.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 222021312989 in words is "two hundred twenty-two billion, twenty-one million, three hundred twelve thousand, nine hundred eighty-nine".