1230111999 has 12 divisors (see below), whose sum is σ = 1795147536. Its totient is φ = 811619712.

The previous prime is 1230111973. The next prime is 1230112021. The reversal of 1230111999 is 9991110321.

It is not a de Polignac number, because 1230111999 - 2¹⁵ = 1230079231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230111919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 703659 + ... + 705404.

It is an arithmetic number, because the mean of its divisors is an integer number (149595628).

Almost surely, 2^1230111999 is an apocalyptic number.

1230111999 is a deficient number, since it is larger than the sum of its proper divisors (565035537).

1230111999 is a wasteful number, since it uses less digits than its factorization.

1230111999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409166 (or 1409163 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 36.

The square root of 1230111999 is about 35072.9525275532. The cubic root of 1230111999 is about 1071.4737891240.

The spelling of 1230111999 in words is "one billion, two hundred thirty million, one hundred eleven thousand, nine hundred ninety-nine".