22011120121021 has 4 divisors (see below), whose sum is σ = 22025982458844. Its totient is φ = 21996257783200.

The previous prime is 22011120121013. The next prime is 22011120121069. The reversal of 22011120121021 is 12012102111022.

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 6892126581796 + 15118993539225 = 2625286^2 + 3888315^2 .

It is a cyclic number.

It is not a de Polignac number, because 22011120121021 - 2³ = 22011120121013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22011120120986 and 22011120121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011120121091) 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, 7431166690 + ... + 7431169651.

It is an arithmetic number, because the mean of its divisors is an integer number (5506495614711).

Almost surely, 2^{22011120121021} is an apocalyptic number.

It is an amenable number.

22011120121021 is a deficient number, since it is larger than the sum of its proper divisors (14862337823).

22011120121021 is a wasteful number, since it uses less digits than its factorization.

22011120121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14862337822.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 22011120121021 its reverse (12012102111022), we get a palindrome (34023222232043).

The spelling of 22011120121021 in words is "twenty-two trillion, eleven billion, one hundred twenty million, one hundred twenty-one thousand, twenty-one".