213023021999 has 2 divisors, whose sum is σ = 213023022000. Its totient is φ = 213023021998.

The previous prime is 213023021977. The next prime is 213023022073. The reversal of 213023021999 is 999120320312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213023021999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213023021909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106511510999 + 106511511000.

It is an arithmetic number, because the mean of its divisors is an integer number (106511511000).

Almost surely, 2^213023021999 is an apocalyptic number.

213023021999 is a deficient number, since it is larger than the sum of its proper divisors (1).

213023021999 is an equidigital number, since it uses as much as digits as its factorization.

213023021999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 41.

The spelling of 213023021999 in words is "two hundred thirteen billion, twenty-three million, twenty-one thousand, nine hundred ninety-nine".