123112201 has 2 divisors, whose sum is σ = 123112202. Its totient is φ = 123112200.

The previous prime is 123112189. The next prime is 123112211. The reversal of 123112201 is 102211321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114468601 + 8643600 = 10699^2 + 2940^2 .

It is a cyclic number.

It is not a de Polignac number, because 123112201 - 2¹⁵ = 123079433 is a prime.

It is a super-2 number, since 2×123112201² = 30313228070128802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123112211) 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, 61556100 + 61556101.

It is an arithmetic number, because the mean of its divisors is an integer number (61556101).

Almost surely, 2^123112201 is an apocalyptic number.

It is an amenable number.

123112201 is a deficient number, since it is larger than the sum of its proper divisors (1).

123112201 is an equidigital number, since it uses as much as digits as its factorization.

123112201 is an odious number, because the sum of its binary digits is odd.

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

The square root of 123112201 is about 11095.5937650943. The cubic root of 123112201 is about 497.4701560341.

Adding to 123112201 its reverse (102211321), we get a palindrome (225323522).

The spelling of 123112201 in words is "one hundred twenty-three million, one hundred twelve thousand, two hundred one".