222211100202021 has 32 divisors (see below), whose sum is σ = 376435912908800. Its totient is φ = 126908422481520.

The previous prime is 222211100202019. The next prime is 222211100202041. The reversal of 222211100202021 is 120202001112222.

It is a happy number.

222211100202021 is a `hidden beast` number, since 222 + 211 + 10 + 0 + 20 + 202 + 1 = 666.

It is not a de Polignac number, because 222211100202021 - 2¹ = 222211100202019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222211100201985 and 222211100202003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222211100202011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 320713501 + ... + 321405618.

It is an arithmetic number, because the mean of its divisors is an integer number (11763622278400).

Almost surely, 2^{222211100202021} is an apocalyptic number.

222211100202021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222211100202021 is a deficient number, since it is larger than the sum of its proper divisors (154224812706779).

222211100202021 is a wasteful number, since it uses less digits than its factorization.

222211100202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642120966 (or 642120960 counting only the distinct ones).

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

Adding to 222211100202021 its reverse (120202001112222), we get a palindrome (342413101314243).

The spelling of 222211100202021 in words is "two hundred twenty-two trillion, two hundred eleven billion, one hundred million, two hundred two thousand, twenty-one".