113121211985 has 8 divisors (see below), whose sum is σ = 136656498600. Its totient is φ = 89889606784.

The previous prime is 113121211969. The next prime is 113121211993. The reversal of 113121211985 is 589112121311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6604487824 + 106516724161 = 81268^2 + 326369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 113121211985 - 2⁴ = 113121211969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75919532 + ... + 75921021.

It is an arithmetic number, because the mean of its divisors is an integer number (17082062325).

Almost surely, 2^113121211985 is an apocalyptic number.

It is an amenable number.

113121211985 is a deficient number, since it is larger than the sum of its proper divisors (23535286615).

113121211985 is a wasteful number, since it uses less digits than its factorization.

113121211985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151840707.

The product of its digits is 4320, while the sum is 35.

The spelling of 113121211985 in words is "one hundred thirteen billion, one hundred twenty-one million, two hundred eleven thousand, nine hundred eighty-five".