1231113005 has 16 divisors (see below), whose sum is σ = 1513142400. Its totient is φ = 961063488.

The previous prime is 1231112977. The next prime is 1231113061. The reversal of 1231113005 is 5003111321.

It is a cyclic number.

It is not a de Polignac number, because 1231113005 - 2⁶ = 1231112941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298739 + ... + 302831.

It is an arithmetic number, because the mean of its divisors is an integer number (94571400).

Almost surely, 2^1231113005 is an apocalyptic number.

It is an amenable number.

1231113005 is a deficient number, since it is larger than the sum of its proper divisors (282029395).

1231113005 is a wasteful number, since it uses less digits than its factorization.

1231113005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5540.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1231113005 is about 35087.2199668198. The cubic root of 1231113005 is about 1071.7643482747.

Adding to 1231113005 its reverse (5003111321), we get a palindrome (6234224326).

The spelling of 1231113005 in words is "one billion, two hundred thirty-one million, one hundred thirteen thousand, five".