210123332989 has 2 divisors, whose sum is σ = 210123332990. Its totient is φ = 210123332988.

The previous prime is 210123332971. The next prime is 210123333019. The reversal of 210123332989 is 989233321012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196825322500 + 13298010489 = 443650^2 + 115317^2 .

It is a cyclic number.

It is not a de Polignac number, because 210123332989 - 2¹³ = 210123324797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210123332929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061666494 + 105061666495.

It is an arithmetic number, because the mean of its divisors is an integer number (105061666495).

Almost surely, 2^210123332989 is an apocalyptic number.

It is an amenable number.

210123332989 is a deficient number, since it is larger than the sum of its proper divisors (1).

210123332989 is an equidigital number, since it uses as much as digits as its factorization.

210123332989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 210123332989 in words is "two hundred ten billion, one hundred twenty-three million, three hundred thirty-two thousand, nine hundred eighty-nine".