211210123 has 2 divisors, whose sum is σ = 211210124. Its totient is φ = 211210122.

The previous prime is 211210079. The next prime is 211210157. The reversal of 211210123 is 321012112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211210123 - 2²⁵ = 177655691 is a prime.

It is not a weakly prime, because it can be changed into another prime (211210423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605061 + 105605062.

It is an arithmetic number, because the mean of its divisors is an integer number (105605062).

Almost surely, 2^211210123 is an apocalyptic number.

211210123 is a deficient number, since it is larger than the sum of its proper divisors (1).

211210123 is an equidigital number, since it uses as much as digits as its factorization.

211210123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 211210123 is about 14533.0699785008. The cubic root of 211210123 is about 595.5317356625.

Adding to 211210123 its reverse (321012112), we get a palindrome (532222235).

The spelling of 211210123 in words is "two hundred eleven million, two hundred ten thousand, one hundred twenty-three".