101200999 has 4 divisors (see below), whose sum is σ = 101221120. Its totient is φ = 101180880.

The previous prime is 101200993. The next prime is 101201003. The reversal of 101200999 is 999002101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 101200999 - 2³ = 101200991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101200999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101200991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4954 + ... + 15064.

It is an arithmetic number, because the mean of its divisors is an integer number (25305280).

Almost surely, 2^101200999 is an apocalyptic number.

101200999 is a deficient number, since it is larger than the sum of its proper divisors (20121).

101200999 is a wasteful number, since it uses less digits than its factorization.

101200999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20120.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 101200999 is about 10059.8707248155. The cubic root of 101200999 is about 466.0096748714.

The spelling of 101200999 in words is "one hundred one million, two hundred thousand, nine hundred ninety-nine".