222102120100021 has 64 divisors (see below), whose sum is σ = 260014030848000. Its totient is φ = 185815737676800.

The previous prime is 222102120100009. The next prime is 222102120100031. The reversal of 222102120100021 is 120001021201222.

It is a happy number.

It is not a de Polignac number, because 222102120100021 - 2⁴³ = 213306027077813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222102120099968 and 222102120100004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222102120100031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6604465035 + ... + 6604498663.

It is an arithmetic number, because the mean of its divisors is an integer number (4062719232000).

Almost surely, 2^{222102120100021} is an apocalyptic number.

It is an amenable number.

222102120100021 is a deficient number, since it is larger than the sum of its proper divisors (37911910747979).

222102120100021 is a wasteful number, since it uses less digits than its factorization.

222102120100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34370.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222102120100021 its reverse (120001021201222), we get a palindrome (342103141301243).

The spelling of 222102120100021 in words is "two hundred twenty-two trillion, one hundred two billion, one hundred twenty million, one hundred thousand, twenty-one".