123201616 has 20 divisors (see below), whose sum is σ = 249082272. Its totient is φ = 58922336.

The previous prime is 123201613. The next prime is 123201623. The reversal of 123201616 is 616102321.

It is a super-2 number, since 2×123201616² = 30357276370022912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123201613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167026 + ... + 167761.

Almost surely, 2^123201616 is an apocalyptic number.

123201616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123201616 is an abundant number, since it is smaller than the sum of its proper divisors (125880656).

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

123201616 is a wasteful number, since it uses less digits than its factorization.

123201616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334818 (or 334812 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 123201616 is about 11099.6223359176. The cubic root of 123201616 is about 497.5905625392.

Adding to 123201616 its reverse (616102321), we get a palindrome (739303937).

The spelling of 123201616 in words is "one hundred twenty-three million, two hundred one thousand, six hundred sixteen".