1231113045 has 8 divisors (see below), whose sum is σ = 1969780896. Its totient is φ = 656593616.

The previous prime is 1231112977. The next prime is 1231113061. The reversal of 1231113045 is 5403111321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231113045 - 2⁷ = 1231112917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41037087 + ... + 41037116.

It is an arithmetic number, because the mean of its divisors is an integer number (246222612).

Almost surely, 2^1231113045 is an apocalyptic number.

1231113045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231113045 is a deficient number, since it is larger than the sum of its proper divisors (738667851).

1231113045 is an equidigital number, since it uses as much as digits as its factorization.

1231113045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82074211.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1231113045 is about 35087.2205368279. The cubic root of 1231113045 is about 1071.7643598822.

Adding to 1231113045 its reverse (5403111321), we get a palindrome (6634224366).

The spelling of 1231113045 in words is "one billion, two hundred thirty-one million, one hundred thirteen thousand, forty-five".