2123595021 has 8 divisors (see below), whose sum is σ = 2980484320. Its totient is φ = 1341217872.

The previous prime is 2123595017. The next prime is 2123595029. The reversal of 2123595021 is 1205953212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2123595021 - 2² = 2123595017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123595021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123595029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18627970 + ... + 18628083.

It is an arithmetic number, because the mean of its divisors is an integer number (372560540).

Almost surely, 2^2123595021 is an apocalyptic number.

It is an amenable number.

2123595021 is a deficient number, since it is larger than the sum of its proper divisors (856889299).

2123595021 is a wasteful number, since it uses less digits than its factorization.

2123595021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37256075.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 2123595021 is about 46082.4806298446. The cubic root of 2123595021 is about 1285.3573919482.

The spelling of 2123595021 in words is "two billion, one hundred twenty-three million, five hundred ninety-five thousand, twenty-one".