2128214787 has 12 divisors (see below), whose sum is σ = 2884915800. Its totient is φ = 1395543360.

The previous prime is 2128214779. The next prime is 2128214801. The reversal of 2128214787 is 7874128212.

It is not a de Polignac number, because 2128214787 - 2³ = 2128214779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2128214707) 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, 84162 + ... + 106487.

It is an arithmetic number, because the mean of its divisors is an integer number (240409650).

Almost surely, 2^2128214787 is an apocalyptic number.

2128214787 is a deficient number, since it is larger than the sum of its proper divisors (756701013).

2128214787 is an equidigital number, since it uses as much as digits as its factorization.

2128214787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190774 (or 190713 counting only the distinct ones).

The product of its digits is 100352, while the sum is 42.

The square root of 2128214787 is about 46132.5783693043. The cubic root of 2128214787 is about 1286.2887920105.

The spelling of 2128214787 in words is "two billion, one hundred twenty-eight million, two hundred fourteen thousand, seven hundred eighty-seven".