2110021987 has 2 divisors, whose sum is σ = 2110021988. Its totient is φ = 2110021986.

The previous prime is 2110021973. The next prime is 2110022011. The reversal of 2110021987 is 7891200112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2110021987 - 2¹⁹ = 2109497699 is a prime.

It is not a weakly prime, because it can be changed into another prime (2110021937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055010993 + 1055010994.

It is an arithmetic number, because the mean of its divisors is an integer number (1055010994).

Almost surely, 2^2110021987 is an apocalyptic number.

2110021987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2110021987 is an equidigital number, since it uses as much as digits as its factorization.

2110021987 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 31.

The square root of 2110021987 is about 45934.9756394841. The cubic root of 2110021987 is about 1282.6130674583.

The spelling of 2110021987 in words is "two billion, one hundred ten million, twenty-one thousand, nine hundred eighty-seven".