2121330187 has 2 divisors, whose sum is σ = 2121330188. Its totient is φ = 2121330186.

The previous prime is 2121330179. The next prime is 2121330229. The reversal of 2121330187 is 7810331212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121330187 - 2³ = 2121330179 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121330157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060665093 + 1060665094.

It is an arithmetic number, because the mean of its divisors is an integer number (1060665094).

Almost surely, 2^2121330187 is an apocalyptic number.

2121330187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121330187 is an equidigital number, since it uses as much as digits as its factorization.

2121330187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2121330187 is about 46057.9003755056. The cubic root of 2121330187 is about 1284.9002808354.

Adding to 2121330187 its reverse (7810331212), we get a palindrome (9931661399).

The spelling of 2121330187 in words is "two billion, one hundred twenty-one million, three hundred thirty thousand, one hundred eighty-seven".