4002121999 has 2 divisors, whose sum is σ = 4002122000. Its totient is φ = 4002121998.

The previous prime is 4002121967. The next prime is 4002122023. The reversal of 4002121999 is 9991212004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4002121999 - 2⁵ = 4002121967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4002121199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001060999 + 2001061000.

It is an arithmetic number, because the mean of its divisors is an integer number (2001061000).

Almost surely, 2^4002121999 is an apocalyptic number.

4002121999 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002121999 is an equidigital number, since it uses as much as digits as its factorization.

4002121999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 4002121999 is about 63262.3268541397. The cubic root of 4002121999 is about 1587.6817076319.

The spelling of 4002121999 in words is "four billion, two million, one hundred twenty-one thousand, nine hundred ninety-nine".