2021013187 has 2 divisors, whose sum is σ = 2021013188. Its totient is φ = 2021013186.

The previous prime is 2021013179. The next prime is 2021013209. The reversal of 2021013187 is 7813101202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021013187 - 2³ = 2021013179 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021013107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010506593 + 1010506594.

It is an arithmetic number, because the mean of its divisors is an integer number (1010506594).

Almost surely, 2^2021013187 is an apocalyptic number.

2021013187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021013187 is an equidigital number, since it uses as much as digits as its factorization.

2021013187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 2021013187 is about 44955.6802528891. The cubic root of 2021013187 is about 1264.3181788180.

Adding to 2021013187 its reverse (7813101202), we get a palindrome (9834114389).

The spelling of 2021013187 in words is "two billion, twenty-one million, thirteen thousand, one hundred eighty-seven".