123212412 has 18 divisors (see below), whose sum is σ = 311453688. Its totient is φ = 41070792.

The previous prime is 123212389. The next prime is 123212423. The reversal of 123212412 is 214212321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1711248 + ... + 1711319.

Almost surely, 2^123212412 is an apocalyptic number.

123212412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123212412 is an abundant number, since it is smaller than the sum of its proper divisors (188241276).

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

123212412 is a wasteful number, since it uses less digits than its factorization.

123212412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422577 (or 3422572 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 123212412 is about 11100.1086481169. The cubic root of 123212412 is about 497.6050965228.

Adding to 123212412 its reverse (214212321), we get a palindrome (337424733).

Subtracting 123212412 from its reverse (214212321), we obtain a palindrome (90999909).

The spelling of 123212412 in words is "one hundred twenty-three million, two hundred twelve thousand, four hundred twelve".