123213120 has 56 divisors (see below), whose sum is σ = 391204704. Its totient is φ = 32856576.

The previous prime is 123213091. The next prime is 123213137. The reversal of 123213120 is 21312321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 123213120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63214 + ... + 65133.

Almost surely, 2^123213120 is an apocalyptic number.

123213120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123213120 is an abundant number, since it is smaller than the sum of its proper divisors (267991584).

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

123213120 is a wasteful number, since it uses less digits than its factorization.

123213120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128367 (or 128357 counting only the distinct ones).

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

The square root of 123213120 is about 11100.1405396508. The cubic root of 123213120 is about 497.6060496295.

Adding to 123213120 its reverse (21312321), we get a palindrome (144525441).

The spelling of 123213120 in words is "one hundred twenty-three million, two hundred thirteen thousand, one hundred twenty".