22112100122021 has 12 divisors (see below), whose sum is σ = 27700872681132. Its totient is φ = 17495288008128.

The previous prime is 22112100121999. The next prime is 22112100122029. The reversal of 22112100122021 is 12022100121122.

It can be written as a sum of positive squares in 2 ways, for example, as 10438165564225 + 11673934557796 = 3230815^2 + 3416714^2 .

It is not a de Polignac number, because 22112100122021 - 2⁴² = 17714053610917 is a prime.

It is a super-2 number, since 2×22112100122021² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112100122029) 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, 17356435880 + ... + 17356437153.

It is an arithmetic number, because the mean of its divisors is an integer number (2308406056761).

Almost surely, 2^{22112100122021} is an apocalyptic number.

It is an amenable number.

22112100122021 is a deficient number, since it is larger than the sum of its proper divisors (5588772559111).

22112100122021 is a wasteful number, since it uses less digits than its factorization.

22112100122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34712873060 (or 34712873053 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22112100122021 its reverse (12022100121122), we get a palindrome (34134200243143).

The spelling of 22112100122021 in words is "twenty-two trillion, one hundred twelve billion, one hundred million, one hundred twenty-two thousand, twenty-one".