113121001 has 4 divisors (see below), whose sum is σ = 129281152. Its totient is φ = 96960852.

The previous prime is 113120981. The next prime is 113121031. The reversal of 113121001 is 100121311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 100121311 = 29 ⋅3452459.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113121001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113121031) 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, 8080065 + ... + 8080078.

It is an arithmetic number, because the mean of its divisors is an integer number (32320288).

Almost surely, 2^113121001 is an apocalyptic number.

It is an amenable number.

113121001 is a deficient number, since it is larger than the sum of its proper divisors (16160151).

113121001 is an equidigital number, since it uses as much as digits as its factorization.

113121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16160150.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 113121001 is about 10635.8356982421. The cubic root of 113121001 is about 483.6313145751.

Adding to 113121001 its reverse (100121311), we get a palindrome (213242312).

The spelling of 113121001 in words is "one hundred thirteen million, one hundred twenty-one thousand, one".