22421630210561 has 4 divisors (see below), whose sum is σ = 22652781037572. Its totient is φ = 22190479383552.

The previous prime is 22421630210537. The next prime is 22421630210627. The reversal of 22421630210561 is 16501203612422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14666073596161 + 7755556614400 = 3829631^2 + 2784880^2 .

It is a cyclic number.

It is not a de Polignac number, because 22421630210561 - 2³⁸ = 22146752303617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22421630210501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115575413360 + ... + 115575413553.

It is an arithmetic number, because the mean of its divisors is an integer number (5663195259393).

Almost surely, 2^{22421630210561} is an apocalyptic number.

It is an amenable number.

22421630210561 is a deficient number, since it is larger than the sum of its proper divisors (231150827011).

22421630210561 is an equidigital number, since it uses as much as digits as its factorization.

22421630210561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231150827010.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 22421630210561 its reverse (16501203612422), we get a palindrome (38922833822983).

The spelling of 22421630210561 in words is "twenty-two trillion, four hundred twenty-one billion, six hundred thirty million, two hundred ten thousand, five hundred sixty-one".