222120011201021 has 4 divisors (see below), whose sum is σ = 222120331126044. Its totient is φ = 222119691276000.

The previous prime is 222120011200949. The next prime is 222120011201029. The reversal of 222120011201021 is 120102110021222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133358382648100 + 88761628552921 = 11548090^2 + 9421339^2 .

It is a cyclic number.

It is not a de Polignac number, because 222120011201021 - 2¹⁸ = 222120010938877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222120011201029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158918810 + ... + 160310411.

It is an arithmetic number, because the mean of its divisors is an integer number (55530082781511).

Almost surely, 2^{222120011201021} is an apocalyptic number.

It is an amenable number.

222120011201021 is a deficient number, since it is larger than the sum of its proper divisors (319925023).

222120011201021 is an equidigital number, since it uses as much as digits as its factorization.

222120011201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319925022.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 222120011201021 its reverse (120102110021222), we get a palindrome (342222121222243).

The spelling of 222120011201021 in words is "two hundred twenty-two trillion, one hundred twenty billion, eleven million, two hundred one thousand, twenty-one".