123212616 has 16 divisors (see below), whose sum is σ = 308031600. Its totient is φ = 41070864.

The previous prime is 123212603. The next prime is 123212623. The reversal of 123212616 is 616212321.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 5133859 = 123212616 / (1 + 2 + 3 + 2 + 1 + 2 + 6 + 1 + 6).

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2566906 + ... + 2566953.

It is an arithmetic number, because the mean of its divisors is an integer number (19251975).

Almost surely, 2^123212616 is an apocalyptic number.

It is an amenable number.

123212616 is an abundant number, since it is smaller than the sum of its proper divisors (184818984).

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

123212616 is a wasteful number, since it uses less digits than its factorization.

123212616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133868 (or 5133864 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 123212616 is about 11100.1178372124. The cubic root of 123212616 is about 497.6053711472.

Adding to 123212616 its reverse (616212321), we get a palindrome (739424937).

The spelling of 123212616 in words is "one hundred twenty-three million, two hundred twelve thousand, six hundred sixteen".