101231999 has 8 divisors (see below), whose sum is σ = 110709840. Its totient is φ = 91800000.

The previous prime is 101231983. The next prime is 101232017. The reversal of 101231999 is 999132101.

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 101231999 - 2⁴ = 101231983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101231939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6752 + ... + 15749.

It is an arithmetic number, because the mean of its divisors is an integer number (13838730).

Almost surely, 2^101231999 is an apocalyptic number.

101231999 is a deficient number, since it is larger than the sum of its proper divisors (9477841).

101231999 is a wasteful number, since it uses less digits than its factorization.

101231999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22921.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 101231999 is about 10061.4113821074. The cubic root of 101231999 is about 466.0572528771.

The spelling of 101231999 in words is "one hundred one million, two hundred thirty-one thousand, nine hundred ninety-nine".