2121111995 has 4 divisors (see below), whose sum is σ = 2545334400. Its totient is φ = 1696889592.

The previous prime is 2121111989. The next prime is 2121112013. The reversal of 2121111995 is 5991111212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121111995 - 2³⁰ = 1047370171 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212111195 + ... + 212111204.

It is an arithmetic number, because the mean of its divisors is an integer number (636333600).

Almost surely, 2^2121111995 is an apocalyptic number.

2121111995 is a deficient number, since it is larger than the sum of its proper divisors (424222405).

2121111995 is an equidigital number, since it uses as much as digits as its factorization.

2121111995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424222404.

The product of its digits is 1620, while the sum is 32.

The square root of 2121111995 is about 46055.5316438753. The cubic root of 2121111995 is about 1284.8562259971.

The spelling of 2121111995 in words is "two billion, one hundred twenty-one million, one hundred eleven thousand, nine hundred ninety-five".