1231113011 has 8 divisors (see below), whose sum is σ = 1251568320. Its totient is φ = 1210779648.

The previous prime is 1231112977. The next prime is 1231113061. The reversal of 1231113011 is 1103111321.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231113011 is a prime.

It is a super-2 number, since 2×1231113011² = 3031278491706972242, which contains 22 as substring.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10016 + ... + 50621.

It is an arithmetic number, because the mean of its divisors is an integer number (156446040).

Almost surely, 2^1231113011 is an apocalyptic number.

1231113011 is a deficient number, since it is larger than the sum of its proper divisors (20455309).

1231113011 is an equidigital number, since it uses as much as digits as its factorization.

1231113011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60973.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1231113011 is about 35087.2200523210. The cubic root of 1231113011 is about 1071.7643500158.

Adding to 1231113011 its reverse (1103111321), we get a palindrome (2334224332).

The spelling of 1231113011 in words is "one billion, two hundred thirty-one million, one hundred thirteen thousand, eleven".