22100010221021 has 4 divisors (see below), whose sum is σ = 22100112899100. Its totient is φ = 22099907542944.

The previous prime is 22100010220877. The next prime is 22100010221057. The reversal of 22100010221021 is 12012201000122.

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 4119738921796 + 17980271299225 = 2029714^2 + 4240315^2 .

It is a cyclic number.

It is not a de Polignac number, because 22100010221021 - 2³⁰ = 22098936479197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22100010220987 and 22100010221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100030221021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51015506 + ... + 51446883.

It is an arithmetic number, because the mean of its divisors is an integer number (5525028224775).

Almost surely, 2^{22100010221021} is an apocalyptic number.

It is an amenable number.

22100010221021 is a deficient number, since it is larger than the sum of its proper divisors (102678079).

22100010221021 is a wasteful number, since it uses less digits than its factorization.

22100010221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102678078.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22100010221021 its reverse (12012201000122), we get a palindrome (34112211221143).

The spelling of 22100010221021 in words is "twenty-two trillion, one hundred billion, ten million, two hundred twenty-one thousand, twenty-one".