113121997 has 4 divisors (see below), whose sum is σ = 115528896. Its totient is φ = 110715100.

The previous prime is 113121979. The next prime is 113122001. The reversal of 113121997 is 799121311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 113121997 - 2¹¹ = 113119949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113121907) 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, 1203379 + ... + 1203472.

It is an arithmetic number, because the mean of its divisors is an integer number (28882224).

Almost surely, 2^113121997 is an apocalyptic number.

It is an amenable number.

113121997 is a deficient number, since it is larger than the sum of its proper divisors (2406899).

113121997 is an equidigital number, since it uses as much as digits as its factorization.

113121997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406898.

The product of its digits is 3402, while the sum is 34.

The square root of 113121997 is about 10635.8825209759. The cubic root of 113121997 is about 483.6327339855.

The spelling of 113121997 in words is "one hundred thirteen million, one hundred twenty-one thousand, nine hundred ninety-seven".