210122109997 has 2 divisors, whose sum is σ = 210122109998. Its totient is φ = 210122109996.

The previous prime is 210122109991. The next prime is 210122110001. The reversal of 210122109997 is 799901221012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178911234441 + 31210875556 = 422979^2 + 176666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210122109997 is a prime.

It is a super-2 number, since 2×210122109997² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210122109991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061054998 + 105061054999.

It is an arithmetic number, because the mean of its divisors is an integer number (105061054999).

Almost surely, 2^210122109997 is an apocalyptic number.

It is an amenable number.

210122109997 is a deficient number, since it is larger than the sum of its proper divisors (1).

210122109997 is an equidigital number, since it uses as much as digits as its factorization.

210122109997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 210122109997 in words is "two hundred ten billion, one hundred twenty-two million, one hundred nine thousand, nine hundred ninety-seven".