211010123 has 2 divisors, whose sum is σ = 211010124. Its totient is φ = 211010122.

The previous prime is 211010101. The next prime is 211010131. The reversal of 211010123 is 321010112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211010123 is a prime.

It is not a weakly prime, because it can be changed into another prime (211010323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105505061 + 105505062.

It is an arithmetic number, because the mean of its divisors is an integer number (105505062).

Almost surely, 2^211010123 is an apocalyptic number.

211010123 is a deficient number, since it is larger than the sum of its proper divisors (1).

211010123 is an equidigital number, since it uses as much as digits as its factorization.

211010123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 211010123 is about 14526.1874901848. The cubic root of 211010123 is about 595.3437018061.

Subtracting from 211010123 its sum of digits (11), we obtain a palindrome (211010112).

Adding to 211010123 its reverse (321010112), we get a palindrome (532020235).

The spelling of 211010123 in words is "two hundred eleven million, ten thousand, one hundred twenty-three".