40020100999 has 2 divisors, whose sum is σ = 40020101000. Its totient is φ = 40020100998.

The previous prime is 40020100997. The next prime is 40020101027. The reversal of 40020100999 is 99900102004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40020100999 - 2¹ = 40020100997 is a prime.

Together with 40020100997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40020100997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010050499 + 20010050500.

It is an arithmetic number, because the mean of its divisors is an integer number (20010050500).

Almost surely, 2^40020100999 is an apocalyptic number.

40020100999 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020100999 is an equidigital number, since it uses as much as digits as its factorization.

40020100999 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 34.

The spelling of 40020100999 in words is "forty billion, twenty million, one hundred thousand, nine hundred ninety-nine".