22100221020121 has 4 divisors (see below), whose sum is σ = 22140623618512. Its totient is φ = 22059818421732.

The previous prime is 22100221020113. The next prime is 22100221020161. The reversal of 22100221020121 is 12102012200122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22100221020121 - 2³ = 22100221020113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22100221020095 and 22100221020104.

It is not an unprimeable number, because it can be changed into a prime (22100221020161) 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, 20201298375 + ... + 20201299468.

It is an arithmetic number, because the mean of its divisors is an integer number (5535155904628).

Almost surely, 2^{22100221020121} is an apocalyptic number.

It is an amenable number.

22100221020121 is a deficient number, since it is larger than the sum of its proper divisors (40402598391).

22100221020121 is an equidigital number, since it uses as much as digits as its factorization.

22100221020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40402598390.

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

Adding to 22100221020121 its reverse (12102012200122), we get a palindrome (34202233220243).

The spelling of 22100221020121 in words is "twenty-two trillion, one hundred billion, two hundred twenty-one million, twenty thousand, one hundred twenty-one".