10101999 has 8 divisors (see below), whose sum is σ = 13833520. Its totient is φ = 6552576.

The previous prime is 10101979. The next prime is 10102003. The reversal of 10101999 is 99910101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10101999 - 2⁸ = 10101743 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 (10101929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45394 + ... + 45615.

It is an arithmetic number, because the mean of its divisors is an integer number (1729190).

Almost surely, 2^10101999 is an apocalyptic number.

10101999 is a deficient number, since it is larger than the sum of its proper divisors (3731521).

10101999 is an equidigital number, since it uses as much as digits as its factorization.

10101999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91049.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 10101999 is about 3178.3642019127. The cubic root of 10101999 is about 216.1734931560.

The spelling of 10101999 in words is "ten million, one hundred one thousand, nine hundred ninety-nine".