222202012221021 has 16 divisors (see below), whose sum is σ = 350269181827200. Its totient is φ = 122594213638848.

The previous prime is 222202012221017. The next prime is 222202012221023. The reversal of 222202012221021 is 120122210202222.

It is not a de Polignac number, because 222202012221021 - 2² = 222202012221017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222202012221023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182431864926 + ... + 182431866143.

It is an arithmetic number, because the mean of its divisors is an integer number (21891823864200).

Almost surely, 2^{222202012221021} is an apocalyptic number.

222202012221021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222202012221021 is a deficient number, since it is larger than the sum of its proper divisors (128067169606179).

222202012221021 is a wasteful number, since it uses less digits than its factorization.

222202012221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364863731108.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 222202012221021 its reverse (120122210202222), we get a palindrome (342324222423243).

The spelling of 222202012221021 in words is "two hundred twenty-two trillion, two hundred two billion, twelve million, two hundred twenty-one thousand, twenty-one".