2121199975 has 12 divisors (see below), whose sum is σ = 2631197416. Its totient is φ = 1696373280.

The previous prime is 2121199963. The next prime is 2121199979. The reversal of 2121199975 is 5799911212.

It is not a de Polignac number, because 2121199975 - 2⁵ = 2121199943 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 (2121199979) 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, 68284 + ... + 94366.

Almost surely, 2^2121199975 is an apocalyptic number.

2121199975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2121199975 is a deficient number, since it is larger than the sum of its proper divisors (509997441).

2121199975 is a wasteful number, since it uses less digits than its factorization.

2121199975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29346 (or 29341 counting only the distinct ones).

The product of its digits is 102060, while the sum is 46.

The square root of 2121199975 is about 46056.4867852510. The cubic root of 2121199975 is about 1284.8739902780.

The spelling of 2121199975 in words is "two billion, one hundred twenty-one million, one hundred ninety-nine thousand, nine hundred seventy-five".