2130837921 has 45 divisors (see below), whose sum is σ = 3342505089. Its totient is φ = 1352701944.

The previous prime is 2130837899. The next prime is 2130837931. The reversal of 2130837921 is 1297380312.

The square root of 2130837921 is 46161.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 2130837921 - 2⁵ = 2130837889 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2130837931) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 9555216 + ... + 9555438.

Almost surely, 2^2130837921 is an apocalyptic number.

2130837921 is the 46161-st square number.

2130837921 is the 23081-st centered octagonal number.

It is an amenable number.

2130837921 is a deficient number, since it is larger than the sum of its proper divisors (1211667168).

2130837921 is an frugal number, since it uses more digits than its factorization.

2130837921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The cubic root of 2130837921 is about 1286.8170473632.

Multiplying 2130837921 by its sum of digits (36), we get a square (76710165156 = 276966²).

The spelling of 2130837921 in words is "two billion, one hundred thirty million, eight hundred thirty-seven thousand, nine hundred twenty-one".