1312101999 has 24 divisors (see below), whose sum is σ = 2129793120. Its totient is φ = 772339392.

The previous prime is 1312101983. The next prime is 1312102027. The reversal of 1312101999 is 9991012131.

It is not a de Polignac number, because 1312101999 - 2⁴ = 1312101983 is a prime.

It is a super-2 number, since 2×1312101999² = 3443223311559592002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312101919) 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 23 ways as a sum of consecutive naturals, for example, 241104 + ... + 246485.

It is an arithmetic number, because the mean of its divisors is an integer number (88741380).

Almost surely, 2^1312101999 is an apocalyptic number.

1312101999 is a deficient number, since it is larger than the sum of its proper divisors (817691121).

1312101999 is a wasteful number, since it uses less digits than its factorization.

1312101999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487631 (or 487628 counting only the distinct ones).

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

The square root of 1312101999 is about 36222.9485133389. The cubic root of 1312101999 is about 1094.7691037520.

The spelling of 1312101999 in words is "one billion, three hundred twelve million, one hundred one thousand, nine hundred ninety-nine".