2130099921 has 12 divisors (see below), whose sum is σ = 3108531972. Its totient is φ = 1405426176.

The previous prime is 2130099919. The next prime is 2130100001. The reversal of 2130099921 is 1299900312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 558849600 + 1571250321 = 23640^2 + 39639^2 .

It is not a de Polignac number, because 2130099921 - 2¹ = 2130099919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2130099911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1219116 + ... + 1220861.

It is an arithmetic number, because the mean of its divisors is an integer number (259044331).

Almost surely, 2^2130099921 is an apocalyptic number.

It is an amenable number.

2130099921 is a deficient number, since it is larger than the sum of its proper divisors (978432051).

2130099921 is a wasteful number, since it uses less digits than its factorization.

2130099921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440080 (or 2440077 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 2130099921 is about 46153.0055467680. The cubic root of 2130099921 is about 1286.6684703442.

The spelling of 2130099921 in words is "two billion, one hundred thirty million, ninety-nine thousand, nine hundred twenty-one".