22125042344221 has 2 divisors, whose sum is σ = 22125042344222. Its totient is φ = 22125042344220.

The previous prime is 22125042344213. The next prime is 22125042344347. The reversal of 22125042344221 is 12244324052122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20283088505625 + 1841953838596 = 4503675^2 + 1357186^2 .

It is a cyclic number.

It is not a de Polignac number, because 22125042344221 - 2³ = 22125042344213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22125042344021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11062521172110 + 11062521172111.

It is an arithmetic number, because the mean of its divisors is an integer number (11062521172111).

Almost surely, 2^{22125042344221} is an apocalyptic number.

It is an amenable number.

22125042344221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22125042344221 is an equidigital number, since it uses as much as digits as its factorization.

22125042344221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61440, while the sum is 34.

Adding to 22125042344221 its reverse (12244324052122), we get a palindrome (34369366396343).

The spelling of 22125042344221 in words is "twenty-two trillion, one hundred twenty-five billion, forty-two million, three hundred forty-four thousand, two hundred twenty-one".