1000121121999 has 16 divisors (see below), whose sum is σ = 1481692499040. Its totient is φ = 666733204800.

The previous prime is 1000121121983. The next prime is 1000121122009. The reversal of 1000121121999 is 9991211210001.

It is not a de Polignac number, because 1000121121999 - 2⁴ = 1000121121983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000121121499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 983059 + ... + 1722395.

It is an arithmetic number, because the mean of its divisors is an integer number (92605781190).

Almost surely, 2^{1000121121999} is an apocalyptic number.

1000121121999 is a deficient number, since it is larger than the sum of its proper divisors (481571377041).

1000121121999 is an equidigital number, since it uses as much as digits as its factorization.

1000121121999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789447 (or 789441 counting only the distinct ones).

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

The spelling of 1000121121999 in words is "one trillion, one hundred twenty-one million, one hundred twenty-one thousand, nine hundred ninety-nine".