25221422101 has 2 divisors, whose sum is σ = 25221422102. Its totient is φ = 25221422100.

The previous prime is 25221422063. The next prime is 25221422147. The reversal of 25221422101 is 10122412252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14043435025 + 11177987076 = 118505^2 + 105726^2 .

It is a cyclic number.

It is not a de Polignac number, because 25221422101 - 2¹¹ = 25221420053 is a prime.

It is a super-2 number, since 2×25221422101² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25221422801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610711050 + 12610711051.

It is an arithmetic number, because the mean of its divisors is an integer number (12610711051).

Almost surely, 2^25221422101 is an apocalyptic number.

It is an amenable number.

25221422101 is a deficient number, since it is larger than the sum of its proper divisors (1).

25221422101 is an equidigital number, since it uses as much as digits as its factorization.

25221422101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 25221422101 its reverse (10122412252), we get a palindrome (35343834353).

The spelling of 25221422101 in words is "twenty-five billion, two hundred twenty-one million, four hundred twenty-two thousand, one hundred one".