22221200101021 has 16 divisors (see below), whose sum is σ = 23253914949120. Its totient is φ = 21194037849600.

The previous prime is 22221200100991. The next prime is 22221200101049. The reversal of 22221200101021 is 12010100212222.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22221200101021 - 2¹¹ = 22221200098973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221200100986 and 22221200101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221200101091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 414927196 + ... + 414980746.

It is an arithmetic number, because the mean of its divisors is an integer number (1453369684320).

Almost surely, 2^{22221200101021} is an apocalyptic number.

It is an amenable number.

22221200101021 is a deficient number, since it is larger than the sum of its proper divisors (1032714848099).

22221200101021 is a wasteful number, since it uses less digits than its factorization.

22221200101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105036.

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

Adding to 22221200101021 its reverse (12010100212222), we get a palindrome (34231300313243).

The spelling of 22221200101021 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred million, one hundred one thousand, twenty-one".