210122100989 has 2 divisors, whose sum is σ = 210122100990. Its totient is φ = 210122100988.

The previous prime is 210122100913. The next prime is 210122101001. The reversal of 210122100989 is 989001221012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141500107225 + 68621993764 = 376165^2 + 261958^2 .

It is a cyclic number.

It is not a de Polignac number, because 210122100989 - 2²⁴ = 210105323773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210122105989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061050494 + 105061050495.

It is an arithmetic number, because the mean of its divisors is an integer number (105061050495).

Almost surely, 2^210122100989 is an apocalyptic number.

It is an amenable number.

210122100989 is a deficient number, since it is larger than the sum of its proper divisors (1).

210122100989 is an equidigital number, since it uses as much as digits as its factorization.

210122100989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 210122100989 in words is "two hundred ten billion, one hundred twenty-two million, one hundred thousand, nine hundred eighty-nine".