123031212 has 24 divisors (see below), whose sum is σ = 288116976. Its totient is φ = 40861248.

The previous prime is 123031177. The next prime is 123031217. The reversal of 123031212 is 212130321.

It is a junction number, because it is equal to n+sod(n) for n = 123031191 and 123031200.

It is not an unprimeable number, because it can be changed into a prime (123031217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15183 + ... + 21830.

It is an arithmetic number, because the mean of its divisors is an integer number (12004874).

Almost surely, 2^123031212 is an apocalyptic number.

123031212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123031212 is an abundant number, since it is smaller than the sum of its proper divisors (165085764).

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

123031212 is a wasteful number, since it uses less digits than its factorization.

123031212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37297 (or 37295 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 123031212 is about 11091.9435627847. The cubic root of 123031212 is about 497.3610456774.

Adding to 123031212 its reverse (212130321), we get a palindrome (335161533).

The spelling of 123031212 in words is "one hundred twenty-three million, thirty-one thousand, two hundred twelve".