22504221050021 has 4 divisors (see below), whose sum is σ = 22597599560844. Its totient is φ = 22410842539200.

The previous prime is 22504221050011. The next prime is 22504221050029. The reversal of 22504221050021 is 12005012240522.

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 15114685593121 + 7389535456900 = 3887761^2 + 2718370^2 .

It is a cyclic number.

It is not a de Polignac number, because 22504221050021 - 2¹⁰ = 22504221048997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22504221050029) 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, 46689255050 + ... + 46689255531.

It is an arithmetic number, because the mean of its divisors is an integer number (5649399890211).

Almost surely, 2^{22504221050021} is an apocalyptic number.

It is an amenable number.

22504221050021 is a deficient number, since it is larger than the sum of its proper divisors (93378510823).

22504221050021 is an equidigital number, since it uses as much as digits as its factorization.

22504221050021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93378510822.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 22504221050021 its reverse (12005012240522), we get a palindrome (34509233290543).

The spelling of 22504221050021 in words is "twenty-two trillion, five hundred four billion, two hundred twenty-one million, fifty thousand, twenty-one".