115221242140 has 24 divisors (see below), whose sum is σ = 245279195280. Its totient is φ = 45457147008.

The previous prime is 115221242137. The next prime is 115221242161. The reversal of 115221242140 is 41242122511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39457870 + ... + 39460789.

It is an arithmetic number, because the mean of its divisors is an integer number (10219966470).

Almost surely, 2^115221242140 is an apocalyptic number.

115221242140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115221242140 is an abundant number, since it is smaller than the sum of its proper divisors (130057953140).

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

115221242140 is a wasteful number, since it uses less digits than its factorization.

115221242140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78918741 (or 78918739 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 115221242140 its reverse (41242122511), we get a palindrome (156463364651).

The spelling of 115221242140 in words is "one hundred fifteen billion, two hundred twenty-one million, two hundred forty-two thousand, one hundred forty".