2153200021 has 16 divisors (see below), whose sum is σ = 2503946880. Its totient is φ = 1813308480.

The previous prime is 2153200013. The next prime is 2153200057. The reversal of 2153200021 is 1200023512.

It is a cyclic number.

It is not a de Polignac number, because 2153200021 - 2³ = 2153200013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2153199968 and 2153200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153200081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471270 + ... + 475816.

It is an arithmetic number, because the mean of its divisors is an integer number (156496680).

Almost surely, 2^2153200021 is an apocalyptic number.

It is an amenable number.

2153200021 is a deficient number, since it is larger than the sum of its proper divisors (350746859).

2153200021 is a wasteful number, since it uses less digits than its factorization.

2153200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5724.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2153200021 is about 46402.5863611071. The cubic root of 2153200021 is about 1291.3028963229.

Adding to 2153200021 its reverse (1200023512), we get a palindrome (3353223533).

The spelling of 2153200021 in words is "two billion, one hundred fifty-three million, two hundred thousand, twenty-one".