10201999 has 4 divisors (see below), whose sum is σ = 10213120. Its totient is φ = 10190880.

The previous prime is 10201987. The next prime is 10202009. The reversal of 10201999 is 99910201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10201999 - 2⁷ = 10201871 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 10201999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201699) 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, 4047 + ... + 6064.

It is an arithmetic number, because the mean of its divisors is an integer number (2553280).

Almost surely, 2^10201999 is an apocalyptic number.

10201999 is a deficient number, since it is larger than the sum of its proper divisors (11121).

10201999 is a wasteful number, since it uses less digits than its factorization.

10201999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11120.

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

The square root of 10201999 is about 3194.0568247919. The cubic root of 10201999 is about 216.8844550410.

The spelling of 10201999 in words is "ten million, two hundred one thousand, nine hundred ninety-nine".