2021018099 has 2 divisors, whose sum is σ = 2021018100. Its totient is φ = 2021018098.

The previous prime is 2021018057. The next prime is 2021018117. The reversal of 2021018099 is 9908101202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021018099 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2021018009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010509049 + 1010509050.

It is an arithmetic number, because the mean of its divisors is an integer number (1010509050).

Almost surely, 2^2021018099 is an apocalyptic number.

2021018099 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021018099 is an equidigital number, since it uses as much as digits as its factorization.

2021018099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 2021018099 is about 44955.7348844394. The cubic root of 2021018099 is about 1264.3192031104.

The spelling of 2021018099 in words is "two billion, twenty-one million, eighteen thousand, ninety-nine".