222000122210021 has 4 divisors (see below), whose sum is σ = 222211752451500. Its totient is φ = 221788491968544.

The previous prime is 222000122209997. The next prime is 222000122210023. The reversal of 222000122210021 is 120012221000222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102775779589921 + 119224342620100 = 10137839^2 + 10918990^2 .

It is a cyclic number.

It is not a de Polignac number, because 222000122210021 - 2²² = 222000118015717 is a prime.

It is a super-2 number, since 2×222000122210021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222000122210023) 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, 105815119166 + ... + 105815121263.

It is an arithmetic number, because the mean of its divisors is an integer number (55552938112875).

Almost surely, 2^{222000122210021} is an apocalyptic number.

It is an amenable number.

222000122210021 is a deficient number, since it is larger than the sum of its proper divisors (211630241479).

222000122210021 is a wasteful number, since it uses less digits than its factorization.

222000122210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211630241478.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222000122210021 its reverse (120012221000222), we get a palindrome (342012343210243).

The spelling of 222000122210021 in words is "two hundred twenty-two trillion, one hundred twenty-two million, two hundred ten thousand, twenty-one".