22201120002121 has 4 divisors (see below), whose sum is σ = 22201343047044. Its totient is φ = 22200896957200.

The previous prime is 22201120002073. The next prime is 22201120002133. The reversal of 22201120002121 is 12120002110222.

It is a happy number.

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 14739372177721 + 7461747824400 = 3839189^2 + 2731620^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201120002121 - 2⁷ = 22201120001993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22201120002095 and 22201120002104.

It is not an unprimeable number, because it can be changed into a prime (22201120002161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111373090 + ... + 111572251.

It is an arithmetic number, because the mean of its divisors is an integer number (5550335761761).

Almost surely, 2^{22201120002121} is an apocalyptic number.

It is an amenable number.

22201120002121 is a deficient number, since it is larger than the sum of its proper divisors (223044923).

22201120002121 is an equidigital number, since it uses as much as digits as its factorization.

22201120002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223044922.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22201120002121 its reverse (12120002110222), we get a palindrome (34321122112343).

The spelling of 22201120002121 in words is "twenty-two trillion, two hundred one billion, one hundred twenty million, two thousand, one hundred twenty-one".