22011010121 has 4 divisors (see below), whose sum is σ = 22770010500. Its totient is φ = 21252009744.

The previous prime is 22011010111. The next prime is 22011010141. The reversal of 22011010121 is 12101011022.

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 13650650896 + 8360359225 = 116836^2 + 91435^2 .

It is a cyclic number.

It is not a de Polignac number, because 22011010121 - 2⁶ = 22011010057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22011010111) 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, 379500146 + ... + 379500203.

It is an arithmetic number, because the mean of its divisors is an integer number (5692502625).

Almost surely, 2^22011010121 is an apocalyptic number.

It is an amenable number.

22011010121 is a deficient number, since it is larger than the sum of its proper divisors (759000379).

22011010121 is an equidigital number, since it uses as much as digits as its factorization.

22011010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759000378.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 22011010121 its reverse (12101011022), we get a palindrome (34112021143).

Subtracting from 22011010121 its reverse (12101011022), we obtain a palindrome (9909999099).

The spelling of 22011010121 in words is "twenty-two billion, eleven million, ten thousand, one hundred twenty-one".