222102111210021 has 24 divisors (see below), whose sum is σ = 376554072720384. Its totient is φ = 123485343683040.

The previous prime is 222102111209983. The next prime is 222102111210059. The reversal of 222102111210021 is 120012111201222.

222102111210021 is a `hidden beast` number, since 2 + 221 + 0 + 211 + 1 + 210 + 0 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (222102111209983) and next prime (222102111210059).

It is not a de Polignac number, because 222102111210021 - 2¹³ = 222102111201829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222102111209976 and 222102111210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222102111710021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47640948165 + ... + 47640952826.

It is an arithmetic number, because the mean of its divisors is an integer number (15689753030016).

Almost surely, 2^{222102111210021} is an apocalyptic number.

222102111210021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222102111210021 is a deficient number, since it is larger than the sum of its proper divisors (154451961510363).

222102111210021 is a wasteful number, since it uses less digits than its factorization.

222102111210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95281901041 (or 95281901038 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 222102111210021 its reverse (120012111201222), we get a palindrome (342114222411243).

The spelling of 222102111210021 in words is "two hundred twenty-two trillion, one hundred two billion, one hundred eleven million, two hundred ten thousand, twenty-one".