222122330021 has 4 divisors (see below), whose sum is σ = 235188349452. Its totient is φ = 209056310592.

The previous prime is 222122329997. The next prime is 222122330041. The reversal of 222122330021 is 120033221222.

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 101130360100 + 120991969921 = 318010^2 + 347839^2 .

It is a cyclic number.

It is not a de Polignac number, because 222122330021 - 2¹⁸ = 222122067877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222122329975 and 222122330002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222122330041) 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, 6533009690 + ... + 6533009723.

It is an arithmetic number, because the mean of its divisors is an integer number (58797087363).

Almost surely, 2^222122330021 is an apocalyptic number.

It is an amenable number.

222122330021 is a deficient number, since it is larger than the sum of its proper divisors (13066019431).

222122330021 is a wasteful number, since it uses less digits than its factorization.

222122330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13066019430.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 222122330021 its reverse (120033221222), we get a palindrome (342155551243).

The spelling of 222122330021 in words is "two hundred twenty-two billion, one hundred twenty-two million, three hundred thirty thousand, twenty-one".