22251120421 has 16 divisors (see below), whose sum is σ = 23184645120. Its totient is φ = 21336670080.

The previous prime is 22251120401. The next prime is 22251120527. The reversal of 22251120421 is 12402115222.

It is a cyclic number.

It is not a de Polignac number, because 22251120421 - 2⁹ = 22251119909 is a prime.

It is a super-2 number, since 2×22251120421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22251120392 and 22251120401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251120401) 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, 1013260 + ... + 1034986.

It is an arithmetic number, because the mean of its divisors is an integer number (1449040320).

Almost surely, 2^22251120421 is an apocalyptic number.

It is an amenable number.

22251120421 is a deficient number, since it is larger than the sum of its proper divisors (933524699).

22251120421 is a wasteful number, since it uses less digits than its factorization.

22251120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22164.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 22251120421 its reverse (12402115222), we get a palindrome (34653235643).

The spelling of 22251120421 in words is "twenty-two billion, two hundred fifty-one million, one hundred twenty thousand, four hundred twenty-one".