2120153999 has 4 divisors (see below), whose sum is σ = 2121326520. Its totient is φ = 2118981480.

The previous prime is 2120153989. The next prime is 2120154019. The reversal of 2120153999 is 9993510212.

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 2120153999 - 2²⁰ = 2119105423 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 (2120153939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 583544 + ... + 587165.

It is an arithmetic number, because the mean of its divisors is an integer number (530331630).

Almost surely, 2^2120153999 is an apocalyptic number.

2120153999 is a deficient number, since it is larger than the sum of its proper divisors (1172521).

2120153999 is a wasteful number, since it uses less digits than its factorization.

2120153999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172520.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 2120153999 is about 46045.1300247920. The cubic root of 2120153999 is about 1284.6627626182.

The spelling of 2120153999 in words is "two billion, one hundred twenty million, one hundred fifty-three thousand, nine hundred ninety-nine".