10000121211999 has 12 divisors (see below), whose sum is σ = 14942709857400. Its totient is φ = 6436859630544.

The previous prime is 10000121211991. The next prime is 10000121212061. The reversal of 10000121211999 is 99911212100001.

It is not a de Polignac number, because 10000121211999 - 2³ = 10000121211991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000121211991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19157320069 + ... + 19157320590.

It is an arithmetic number, because the mean of its divisors is an integer number (1245225821450).

Almost surely, 2^{10000121211999} is an apocalyptic number.

10000121211999 is a deficient number, since it is larger than the sum of its proper divisors (4942588645401).

10000121211999 is a wasteful number, since it uses less digits than its factorization.

10000121211999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38314640694 (or 38314640691 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 36.

The spelling of 10000121211999 in words is "ten trillion, one hundred twenty-one million, two hundred eleven thousand, nine hundred ninety-nine".