123021320 has 32 divisors (see below), whose sum is σ = 283552920. Its totient is φ = 48007680.

The previous prime is 123021307. The next prime is 123021331. The reversal of 123021320 is 23120321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 101324356 + 21696964 = 10066^2 + 4658^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123021295 and 123021304.

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, 35867 + ... + 39146.

Almost surely, 2^123021320 is an apocalyptic number.

123021320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123021320 is an abundant number, since it is smaller than the sum of its proper divisors (160531600).

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

123021320 is a wasteful number, since it uses less digits than its factorization.

123021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75065 (or 75061 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 123021320 is about 11091.4976445925. The cubic root of 123021320 is about 497.3477156525.

Adding to 123021320 its reverse (23120321), we get a palindrome (146141641).

Subtracting from 123021320 its reverse (23120321), we obtain a palindrome (99900999).

The spelling of 123021320 in words is "one hundred twenty-three million, twenty-one thousand, three hundred twenty".