25221224201 has 2 divisors, whose sum is σ = 25221224202. Its totient is φ = 25221224200.

The previous prime is 25221224173. The next prime is 25221224213. The reversal of 25221224201 is 10242212252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16775430400 + 8445793801 = 129520^2 + 91901^2 .

It is a cyclic number.

It is not a de Polignac number, because 25221224201 - 2⁶ = 25221224137 is a prime.

It is a super-2 number, since 2×25221224201² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25221224401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610612100 + 12610612101.

It is an arithmetic number, because the mean of its divisors is an integer number (12610612101).

Almost surely, 2^25221224201 is an apocalyptic number.

It is an amenable number.

25221224201 is a deficient number, since it is larger than the sum of its proper divisors (1).

25221224201 is an equidigital number, since it uses as much as digits as its factorization.

25221224201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 25221224201 its reverse (10242212252), we get a palindrome (35463436453).

The spelling of 25221224201 in words is "twenty-five billion, two hundred twenty-one million, two hundred twenty-four thousand, two hundred one".