22115345421 has 16 divisors (see below), whose sum is σ = 31805728640. Its totient is φ = 13587860160.

The previous prime is 22115345419. The next prime is 22115345453. The reversal of 22115345421 is 12454351122.

It is not a de Polignac number, because 22115345421 - 2¹ = 22115345419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22115345321) 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, 424726 + ... + 473943.

It is an arithmetic number, because the mean of its divisors is an integer number (1987858040).

Almost surely, 2^22115345421 is an apocalyptic number.

It is an amenable number.

22115345421 is a deficient number, since it is larger than the sum of its proper divisors (9690383219).

22115345421 is a wasteful number, since it uses less digits than its factorization.

22115345421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899316.

The product of its digits is 9600, while the sum is 30.

Adding to 22115345421 its reverse (12454351122), we get a palindrome (34569696543).

The spelling of 22115345421 in words is "twenty-two billion, one hundred fifteen million, three hundred forty-five thousand, four hundred twenty-one".