22112202221021 has 12 divisors (see below), whose sum is σ = 24305570057916. Its totient is φ = 20101652862720.

The previous prime is 22112202221003. The next prime is 22112202221111. The reversal of 22112202221021 is 12012220221122.

It can be written as a sum of positive squares in 2 ways, for example, as 11302277476996 + 10809924744025 = 3361886^2 + 3287845^2 .

It is not a de Polignac number, because 22112202221021 - 2¹⁰ = 22112202219997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22112202220984 and 22112202221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112202221321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5539751 + ... + 8655243.

It is an arithmetic number, because the mean of its divisors is an integer number (2025464171493).

Almost surely, 2^{22112202221021} is an apocalyptic number.

It is an amenable number.

22112202221021 is a deficient number, since it is larger than the sum of its proper divisors (2193367836895).

22112202221021 is a wasteful number, since it uses less digits than its factorization.

22112202221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174172 (or 3174161 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22112202221021 its reverse (12012220221122), we get a palindrome (34124422442143).

The spelling of 22112202221021 in words is "twenty-two trillion, one hundred twelve billion, two hundred two million, two hundred twenty-one thousand, twenty-one".