115240235221 has 2 divisors, whose sum is σ = 115240235222. Its totient is φ = 115240235220.

The previous prime is 115240235197. The next prime is 115240235251. The reversal of 115240235221 is 122532042511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84550100625 + 30690134596 = 290775^2 + 175186^2 .

It is a cyclic number.

It is not a de Polignac number, because 115240235221 - 2²¹ = 115238138069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115240235221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115240235251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57620117610 + 57620117611.

It is an arithmetic number, because the mean of its divisors is an integer number (57620117611).

Almost surely, 2^115240235221 is an apocalyptic number.

It is an amenable number.

115240235221 is a deficient number, since it is larger than the sum of its proper divisors (1).

115240235221 is an equidigital number, since it uses as much as digits as its factorization.

115240235221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 115240235221 its reverse (122532042511), we get a palindrome (237772277732).

The spelling of 115240235221 in words is "one hundred fifteen billion, two hundred forty million, two hundred thirty-five thousand, two hundred twenty-one".