222100221210021 has 48 divisors (see below), whose sum is σ = 400320194347008. Its totient is φ = 115276497444000.

The previous prime is 222100221210001. The next prime is 222100221210097. The reversal of 222100221210021 is 120012122001222.

It is a happy number.

222100221210021 is a `hidden beast` number, since 2 + 2 + 210 + 0 + 221 + 210 + 0 + 21 = 666.

It is not a de Polignac number, because 222100221210021 - 2³⁰ = 222099147468197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222100221209976 and 222100221210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222100221210001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138425181 + ... + 140020466.

It is an arithmetic number, because the mean of its divisors is an integer number (8340004048896).

Almost surely, 2^{222100221210021} is an apocalyptic number.

222100221210021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222100221210021 is a deficient number, since it is larger than the sum of its proper divisors (178219973136987).

222100221210021 is a wasteful number, since it uses less digits than its factorization.

222100221210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278446822 (or 278446819 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222100221210021 its reverse (120012122001222), we get a palindrome (342112343211243).

The spelling of 222100221210021 in words is "two hundred twenty-two trillion, one hundred billion, two hundred twenty-one million, two hundred ten thousand, twenty-one".