210122111999 has 2 divisors, whose sum is σ = 210122112000. Its totient is φ = 210122111998.

The previous prime is 210122111989. The next prime is 210122112071. The reversal of 210122111999 is 999111221012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210122111999 - 2³⁶ = 141402635263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210122111909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061055999 + 105061056000.

It is an arithmetic number, because the mean of its divisors is an integer number (105061056000).

Almost surely, 2^210122111999 is an apocalyptic number.

210122111999 is a deficient number, since it is larger than the sum of its proper divisors (1).

210122111999 is an equidigital number, since it uses as much as digits as its factorization.

210122111999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 210122111999 in words is "two hundred ten billion, one hundred twenty-two million, one hundred eleven thousand, nine hundred ninety-nine".