1131890012 has 12 divisors (see below), whose sum is σ = 2160881016. Its totient is φ = 514495440.

The previous prime is 1131890009. The next prime is 1131890017. The reversal of 1131890012 is 2100981311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131890017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12862343 + ... + 12862430.

It is an arithmetic number, because the mean of its divisors is an integer number (180073418).

Almost surely, 2^1131890012 is an apocalyptic number.

It is an amenable number.

1131890012 is a deficient number, since it is larger than the sum of its proper divisors (1028991004).

1131890012 is a wasteful number, since it uses less digits than its factorization.

1131890012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25724788 (or 25724786 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1131890012 is about 33643.5731158270. The cubic root of 1131890012 is about 1042.1608216722.

The spelling of 1131890012 in words is "one billion, one hundred thirty-one million, eight hundred ninety thousand, twelve".