115215121231320 has 128 divisors (see below), whose sum is σ = 379819988835840. Its totient is φ = 27727062973440.

The previous prime is 115215121231319. The next prime is 115215121231333. The reversal of 115215121231320 is 23132121512511.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 318374572 + ... + 318736251.

It is an arithmetic number, because the mean of its divisors is an integer number (2967343662780).

Almost surely, 2^{115215121231320} is an apocalyptic number.

115215121231320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115215121231320 is an abundant number, since it is smaller than the sum of its proper divisors (264604867604520).

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

115215121231320 is a wasteful number, since it uses less digits than its factorization.

115215121231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637110985 (or 637110981 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

Adding to 115215121231320 its reverse (23132121512511), we get a palindrome (138347242743831).

The spelling of 115215121231320 in words is "one hundred fifteen trillion, two hundred fifteen billion, one hundred twenty-one million, two hundred thirty-one thousand, three hundred twenty".