2021012999 has 2 divisors, whose sum is σ = 2021013000. Its totient is φ = 2021012998.

The previous prime is 2021012971. The next prime is 2021013077. The reversal of 2021012999 is 9992101202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021012999 - 2²⁸ = 1752577543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021012909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010506499 + 1010506500.

It is an arithmetic number, because the mean of its divisors is an integer number (1010506500).

Almost surely, 2^2021012999 is an apocalyptic number.

2021012999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021012999 is an equidigital number, since it uses as much as digits as its factorization.

2021012999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 2021012999 is about 44955.6781619408. The cubic root of 2021012999 is about 1264.3181396145.

The spelling of 2021012999 in words is "two billion, twenty-one million, twelve thousand, nine hundred ninety-nine".