1231113001 has 4 divisors (see below), whose sum is σ = 1231321600. Its totient is φ = 1230904404.

The previous prime is 1231112977. The next prime is 1231113061. The reversal of 1231113001 is 1003111321.

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 1231113001 - 2⁵ = 1231112969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231113061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95181 + ... + 107338.

It is an arithmetic number, because the mean of its divisors is an integer number (307830400).

Almost surely, 2^1231113001 is an apocalyptic number.

It is an amenable number.

1231113001 is a deficient number, since it is larger than the sum of its proper divisors (208599).

1231113001 is an equidigital number, since it uses as much as digits as its factorization.

1231113001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208598.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1231113001 is about 35087.2199098190. The cubic root of 1231113001 is about 1071.7643471139.

Adding to 1231113001 its reverse (1003111321), we get a palindrome (2234224322).

The spelling of 1231113001 in words is "one billion, two hundred thirty-one million, one hundred thirteen thousand, one".