123136212 has 12 divisors (see below), whose sum is σ = 287317856. Its totient is φ = 41045400.

The previous prime is 123136187. The next prime is 123136249. The reversal of 123136212 is 212631321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5130664 + ... + 5130687.

Almost surely, 2^123136212 is an apocalyptic number.

123136212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123136212 is an abundant number, since it is smaller than the sum of its proper divisors (164181644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123136212 is a wasteful number, since it uses less digits than its factorization.

123136212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10261358 (or 10261356 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 123136212 is about 11096.6757184303. The cubic root of 123136212 is about 497.5024950423.

Adding to 123136212 its reverse (212631321), we get a palindrome (335767533).

The spelling of 123136212 in words is "one hundred twenty-three million, one hundred thirty-six thousand, two hundred twelve".