123212133 has 12 divisors (see below), whose sum is σ = 194152608. Its totient is φ = 74673960.

The previous prime is 123212087. The next prime is 123212143. The reversal of 123212133 is 331212321.

It is not a de Polignac number, because 123212133 - 2⁶ = 123212069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123212143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 622185 + ... + 622382.

It is an arithmetic number, because the mean of its divisors is an integer number (16179384).

Almost surely, 2^123212133 is an apocalyptic number.

It is an amenable number.

123212133 is a deficient number, since it is larger than the sum of its proper divisors (70940475).

123212133 is a wasteful number, since it uses less digits than its factorization.

123212133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244584 (or 1244581 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 123212133 is about 11100.0960806652. The cubic root of 123212133 is about 497.6047209332.

Adding to 123212133 its reverse (331212321), we get a palindrome (454424454).

The spelling of 123212133 in words is "one hundred twenty-three million, two hundred twelve thousand, one hundred thirty-three".