113221209987 has 12 divisors (see below), whose sum is σ = 163722070200. Its totient is φ = 75397580928.

The previous prime is 113221209977. The next prime is 113221209991. The reversal of 113221209987 is 789902122311.

It is not a de Polignac number, because 113221209987 - 2⁴ = 113221209971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113221209917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6926862 + ... + 6943187.

It is an arithmetic number, because the mean of its divisors is an integer number (13643505850).

Almost surely, 2^113221209987 is an apocalyptic number.

113221209987 is a deficient number, since it is larger than the sum of its proper divisors (50500860213).

113221209987 is a wasteful number, since it uses less digits than its factorization.

113221209987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13870962 (or 13870959 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 113221209987 in words is "one hundred thirteen billion, two hundred twenty-one million, two hundred nine thousand, nine hundred eighty-seven".