115221242136 has 128 divisors (see below), whose sum is σ = 386756697600. Its totient is φ = 27625466880.

The previous prime is 115221242069. The next prime is 115221242137. The reversal of 115221242136 is 631242122511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115221242137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2374021 + ... + 2422068.

It is an arithmetic number, because the mean of its divisors is an integer number (3021536700).

Almost surely, 2^115221242136 is an apocalyptic number.

It is an amenable number.

115221242136 is an abundant number, since it is smaller than the sum of its proper divisors (271535455464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115221242136 is a wasteful number, since it uses less digits than its factorization.

115221242136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4796129 (or 4796125 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

Adding to 115221242136 its reverse (631242122511), we get a palindrome (746463364647).

The spelling of 115221242136 in words is "one hundred fifteen billion, two hundred twenty-one million, two hundred forty-two thousand, one hundred thirty-six".