22451222215421 has 8 divisors (see below), whose sum is σ = 23277549713664. Its totient is φ = 21631275624960.

The previous prime is 22451222215393. The next prime is 22451222215447. The reversal of 22451222215421 is 12451222215422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22451222215421 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 (22451222215921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595219780 + ... + 1595233853.

It is an arithmetic number, because the mean of its divisors is an integer number (2909693714208).

Almost surely, 2^{22451222215421} is an apocalyptic number.

It is an amenable number.

22451222215421 is a deficient number, since it is larger than the sum of its proper divisors (826327498243).

22451222215421 is a wasteful number, since it uses less digits than its factorization.

22451222215421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3190453891.

The product of its digits is 51200, while the sum is 35.

Subtracting from 22451222215421 its reverse (12451222215422), we obtain a palindrome (9999999999999).

The spelling of 22451222215421 in words is "twenty-two trillion, four hundred fifty-one billion, two hundred twenty-two million, two hundred fifteen thousand, four hundred twenty-one".