22021100122021 has 64 divisors (see below), whose sum is σ = 30118169088000. Its totient is φ = 15544869350400.

The previous prime is 22021100122009. The next prime is 22021100122079. The reversal of 22021100122021 is 12022100112022.

It is a happy number.

It is not a de Polignac number, because 22021100122021 - 2²³ = 22021091733413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22021100121986 and 22021100122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021100126021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35065101 + ... + 35687581.

It is an arithmetic number, because the mean of its divisors is an integer number (470596392000).

Almost surely, 2^{22021100122021} is an apocalyptic number.

It is an amenable number.

22021100122021 is a deficient number, since it is larger than the sum of its proper divisors (8097068965979).

22021100122021 is a wasteful number, since it uses less digits than its factorization.

22021100122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623170.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22021100122021 its reverse (12022100112022), we get a palindrome (34043200234043).

Subtracting from 22021100122021 its reverse (12022100112022), we obtain a palindrome (9999000009999).

The spelling of 22021100122021 in words is "twenty-two trillion, twenty-one billion, one hundred million, one hundred twenty-two thousand, twenty-one".