22100321421 has 64 divisors (see below), whose sum is σ = 34559136000. Its totient is φ = 13937817600.

The previous prime is 22100321413. The next prime is 22100321423. The reversal of 22100321421 is 12412300122.

It is a happy number.

22100321421 is a `hidden beast` number, since 2 + 210 + 0 + 32 + 1 + 421 = 666.

It is not a de Polignac number, because 22100321421 - 2³ = 22100321413 is a prime.

It is a super-2 number, since 2×22100321421² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22100321394 and 22100321403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100321423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18524401 + ... + 18525593.

It is an arithmetic number, because the mean of its divisors is an integer number (539986500).

Almost surely, 2^22100321421 is an apocalyptic number.

It is an amenable number.

22100321421 is a deficient number, since it is larger than the sum of its proper divisors (12458814579).

22100321421 is a wasteful number, since it uses less digits than its factorization.

22100321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691 (or 1685 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22100321421 its reverse (12412300122), we get a palindrome (34512621543).

The spelling of 22100321421 in words is "twenty-two billion, one hundred million, three hundred twenty-one thousand, four hundred twenty-one".