13123212 has 24 divisors (see below), whose sum is σ = 30700656. Its totient is φ = 4363008.

The previous prime is 13123211. The next prime is 13123217. The reversal of 13123212 is 21232131.

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

It is a junction number, because it is equal to n+sod(n) for n = 13123191 and 13123200.

It is not an unprimeable number, because it can be changed into a prime (13123211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4288 + ... + 6680.

It is an arithmetic number, because the mean of its divisors is an integer number (1279194).

Almost surely, 2^13123212 is an apocalyptic number.

13123212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13123212 is an abundant number, since it is smaller than the sum of its proper divisors (17577444).

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

13123212 is a wasteful number, since it uses less digits than its factorization.

13123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857 (or 2855 counting only the distinct ones).

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

The square root of 13123212 is about 3622.5974106986. The cubic root of 13123212 is about 235.8739871175.

Adding to 13123212 its reverse (21232131), we get a palindrome (34355343).

It can be divided in two parts, 1 and 3123212, that added together give a palindrome (3123213).

The spelling of 13123212 in words is "thirteen million, one hundred twenty-three thousand, two hundred twelve".