2120209975 has 24 divisors (see below), whose sum is σ = 2873583440. Its totient is φ = 1542309120.

The previous prime is 2120209969. The next prime is 2120210003. The reversal of 2120209975 is 5799020212.

It is not a de Polignac number, because 2120209975 - 2²¹ = 2118112823 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26910 + ... + 70459.

Almost surely, 2^2120209975 is an apocalyptic number.

2120209975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2120209975 is a deficient number, since it is larger than the sum of its proper divisors (753373465).

2120209975 is a wasteful number, since it uses less digits than its factorization.

2120209975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97459 (or 97454 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 2120209975 is about 46045.7378592199. The cubic root of 2120209975 is about 1284.6740683457.

The spelling of 2120209975 in words is "two billion, one hundred twenty million, two hundred nine thousand, nine hundred seventy-five".