22120021011121 has 36 divisors (see below), whose sum is σ = 24627698777500. Its totient is φ = 19852574544000.

The previous prime is 22120021011113. The next prime is 22120021011139. The reversal of 22120021011121 is 12111012002122.

It can be written as a sum of positive squares in 6 ways, for example, as 4400299140721 + 17719721870400 = 2097689^2 + 4209480^2 .

It is not a de Polignac number, because 22120021011121 - 2³ = 22120021011113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22120021011095 and 22120021011104.

It is not an unprimeable number, because it can be changed into a prime (22120021011161) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 430752355 + ... + 430803703.

Almost surely, 2^{22120021011121} is an apocalyptic number.

It is an amenable number.

22120021011121 is a deficient number, since it is larger than the sum of its proper divisors (2507677766379).

22120021011121 is a wasteful number, since it uses less digits than its factorization.

22120021011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51922 (or 51810 counting only the distinct ones).

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

Adding to 22120021011121 its reverse (12111012002122), we get a palindrome (34231033013243).

The spelling of 22120021011121 in words is "twenty-two trillion, one hundred twenty billion, twenty-one million, eleven thousand, one hundred twenty-one".