115221242245 has 4 divisors (see below), whose sum is σ = 138265490700. Its totient is φ = 92176993792.

The previous prime is 115221242237. The next prime is 115221242293. The reversal of 115221242245 is 542242122511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41281299684 + 73939942561 = 203178^2 + 271919^2 .

It is a cyclic number.

It is not a de Polignac number, because 115221242245 - 2³ = 115221242237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11522124220 + ... + 11522124229.

It is an arithmetic number, because the mean of its divisors is an integer number (34566372675).

Almost surely, 2^115221242245 is an apocalyptic number.

It is an amenable number.

115221242245 is a deficient number, since it is larger than the sum of its proper divisors (23044248455).

115221242245 is an equidigital number, since it uses as much as digits as its factorization.

115221242245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23044248454.

The product of its digits is 12800, while the sum is 31.

Adding to 115221242245 its reverse (542242122511), we get a palindrome (657463364756).

The spelling of 115221242245 in words is "one hundred fifteen billion, two hundred twenty-one million, two hundred forty-two thousand, two hundred forty-five".