115221012 has 12 divisors (see below), whose sum is σ = 268849056. Its totient is φ = 38407000.

The previous prime is 115221011. The next prime is 115221023. The reversal of 115221012 is 210122511.

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

It is a junction number, because it is equal to n+sod(n) for n = 115220982 and 115221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115221011) 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, 4800864 + ... + 4800887.

It is an arithmetic number, because the mean of its divisors is an integer number (22404088).

Almost surely, 2^115221012 is an apocalyptic number.

115221012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

115221012 is an abundant number, since it is smaller than the sum of its proper divisors (153628044).

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

115221012 is a wasteful number, since it uses less digits than its factorization.

115221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9601758 (or 9601756 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 115221012 is about 10734.1050861262. The cubic root of 115221012 is about 486.6057410021.

Adding to 115221012 its reverse (210122511), we get a palindrome (325343523).

The spelling of 115221012 in words is "one hundred fifteen million, two hundred twenty-one thousand, twelve".