115220100 has 36 divisors (see below), whose sum is σ = 333371024. Its totient is φ = 30725280.

The previous prime is 115220071. The next prime is 115220113. The reversal of 115220100 is 1022511.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191734 + ... + 192333.

Almost surely, 2^115220100 is an apocalyptic number.

115220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115220100 is an abundant number, since it is smaller than the sum of its proper divisors (218150924).

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

115220100 is a wasteful number, since it uses less digits than its factorization.

115220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384084 (or 384077 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 115220100 is about 10734.0626046246. The cubic root of 115220100 is about 486.6044571344.

Adding to 115220100 its reverse (1022511), we get a palindrome (116242611).

The spelling of 115220100 in words is "one hundred fifteen million, two hundred twenty thousand, one hundred".