123212123412 has 48 divisors (see below), whose sum is σ = 342851131392. Its totient is φ = 33672877920.

The previous prime is 123212123399. The next prime is 123212123413. The reversal of 123212123412 is 214321212321.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123212123413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31885264 + ... + 31889127.

It is an arithmetic number, because the mean of its divisors is an integer number (7142731904).

Almost surely, 2^123212123412 is an apocalyptic number.

123212123412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123212123412 is an abundant number, since it is smaller than the sum of its proper divisors (219639007980).

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

123212123412 is a wasteful number, since it uses less digits than its factorization.

123212123412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63774428 (or 63774426 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 123212123412 its reverse (214321212321), we get a palindrome (337533335733).

The spelling of 123212123412 in words is "one hundred twenty-three billion, two hundred twelve million, one hundred twenty-three thousand, four hundred twelve".