1002121999 has 8 divisors (see below), whose sum is σ = 1043640000. Its totient is φ = 961068192.

The previous prime is 1002121963. The next prime is 1002122047. The reversal of 1002121999 is 9991212001.

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

It is a cyclic number.

It is not a de Polignac number, because 1002121999 - 2⁷ = 1002121871 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 (1002121909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111639 + ... + 120280.

It is an arithmetic number, because the mean of its divisors is an integer number (130455000).

Almost surely, 2^1002121999 is an apocalyptic number.

1002121999 is a deficient number, since it is larger than the sum of its proper divisors (41518001).

1002121999 is a wasteful number, since it uses less digits than its factorization.

1002121999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232097.

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

The square root of 1002121999 is about 31656.3105715116. The cubic root of 1002121999 is about 1000.7068332690.

The spelling of 1002121999 in words is "one billion, two million, one hundred twenty-one thousand, nine hundred ninety-nine".