1231011400 has 48 divisors (see below), whose sum is σ = 2910639600. Its totient is φ = 484054080.

The previous prime is 1231011391. The next prime is 1231011403. The reversal of 1231011400 is 41101321.

It is not an unprimeable number, because it can be changed into a prime (1231011403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40362 + ... + 63961.

It is an arithmetic number, because the mean of its divisors is an integer number (60638325).

Almost surely, 2^1231011400 is an apocalyptic number.

1231011400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231011400 is an abundant number, since it is smaller than the sum of its proper divisors (1679628200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231011400 is a wasteful number, since it uses less digits than its factorization.

1231011400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104398 (or 104389 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1231011400 is about 35085.7720450897. The cubic root of 1231011400 is about 1071.7348628654.

Adding to 1231011400 its reverse (41101321), we get a palindrome (1272112721).

The spelling of 1231011400 in words is "one billion, two hundred thirty-one million, eleven thousand, four hundred".