22425204032221 has 2 divisors, whose sum is σ = 22425204032222. Its totient is φ = 22425204032220.

The previous prime is 22425204032137. The next prime is 22425204032237. The reversal of 22425204032221 is 12223040252422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13279938547225 + 9145265484996 = 3644165^2 + 3024114^2 .

It is a cyclic number.

It is not a de Polignac number, because 22425204032221 - 2¹³ = 22425204024029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22425204032251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11212602016110 + 11212602016111.

It is an arithmetic number, because the mean of its divisors is an integer number (11212602016111).

Almost surely, 2^{22425204032221} is an apocalyptic number.

It is an amenable number.

22425204032221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22425204032221 is an equidigital number, since it uses as much as digits as its factorization.

22425204032221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 22425204032221 its reverse (12223040252422), we get a palindrome (34648244284643).

The spelling of 22425204032221 in words is "twenty-two trillion, four hundred twenty-five billion, two hundred four million, thirty-two thousand, two hundred twenty-one".