123195211 has 2 divisors, whose sum is σ = 123195212. Its totient is φ = 123195210.

The previous prime is 123195167. The next prime is 123195217. The reversal of 123195211 is 112591321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123195211 is a prime.

It is a super-3 number, since 3×123195211³ (a number of 25 digits) contains 333 as substring.

It is equal to p_7013149 and since 123195211 and 7013149 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (123195217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61597605 + 61597606.

It is an arithmetic number, because the mean of its divisors is an integer number (61597606).

Almost surely, 2^123195211 is an apocalyptic number.

123195211 is a deficient number, since it is larger than the sum of its proper divisors (1).

123195211 is an equidigital number, since it uses as much as digits as its factorization.

123195211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 25.

The square root of 123195211 is about 11099.3338088374. Note that the first 3 decimals coincide. The cubic root of 123195211 is about 497.5819394846.

The spelling of 123195211 in words is "one hundred twenty-three million, one hundred ninety-five thousand, two hundred eleven".