2010121999 has 4 divisors (see below), whose sum is σ = 2013172920. Its totient is φ = 2007071080.

The previous prime is 2010121987. The next prime is 2010122011. The reversal of 2010121999 is 9991210102.

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

It is an interprime number because it is at equal distance from previous prime (2010121987) and next prime (2010122011).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2010121999 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 (2010521999) 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, 1524472 + ... + 1525789.

It is an arithmetic number, because the mean of its divisors is an integer number (503293230).

Almost surely, 2^2010121999 is an apocalyptic number.

2010121999 is a deficient number, since it is larger than the sum of its proper divisors (3050921).

2010121999 is an equidigital number, since it uses as much as digits as its factorization.

2010121999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050920.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 2010121999 is about 44834.3841153193. The cubic root of 2010121999 is about 1262.0429608484.

The spelling of 2010121999 in words is "two billion, ten million, one hundred twenty-one thousand, nine hundred ninety-nine".