115250240221 has 2 divisors, whose sum is σ = 115250240222. Its totient is φ = 115250240220.

The previous prime is 115250240197. The next prime is 115250240239. The reversal of 115250240221 is 122042052511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107378114596 + 7872125625 = 327686^2 + 88725^2 .

It is a cyclic number.

It is not a de Polignac number, because 115250240221 - 2¹⁵ = 115250207453 is a prime.

It is a super-2 number, since 2×115250240221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115250240251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57625120110 + 57625120111.

It is an arithmetic number, because the mean of its divisors is an integer number (57625120111).

Almost surely, 2^115250240221 is an apocalyptic number.

It is an amenable number.

115250240221 is a deficient number, since it is larger than the sum of its proper divisors (1).

115250240221 is an equidigital number, since it uses as much as digits as its factorization.

115250240221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 115250240221 its reverse (122042052511), we get a palindrome (237292292732).

The spelling of 115250240221 in words is "one hundred fifteen billion, two hundred fifty million, two hundred forty thousand, two hundred twenty-one".