115111212 has 12 divisors (see below), whose sum is σ = 268592856. Its totient is φ = 38370400.

The previous prime is 115111193. The next prime is 115111219. The reversal of 115111212 is 212111511.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×115111212² = 26501182256217888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 115111191 and 115111200.

It is not an unprimeable number, because it can be changed into a prime (115111219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4796289 + ... + 4796312.

It is an arithmetic number, because the mean of its divisors is an integer number (22382738).

Almost surely, 2^115111212 is an apocalyptic number.

115111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

115111212 is an abundant number, since it is smaller than the sum of its proper divisors (153481644).

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

115111212 is a wasteful number, since it uses less digits than its factorization.

115111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9592608 (or 9592606 counting only the distinct ones).

The product of its digits is 20, while the sum is 15.

The square root of 115111212 is about 10728.9893279843. The cubic root of 115111212 is about 486.4511213708.

Adding to 115111212 its reverse (212111511), we get a palindrome (327222723).

The spelling of 115111212 in words is "one hundred fifteen million, one hundred eleven thousand, two hundred twelve".