23120321 has 16 divisors (see below), whose sum is σ = 28047360. Its totient is φ = 18617040.

The previous prime is 23120311. The next prime is 23120329. The reversal of 23120321 is 12302132.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 23120321 - 2¹⁰ = 23119297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23120296 and 23120305.

It is not an unprimeable number, because it can be changed into a prime (23120329) 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, 16760 + ... + 18086.

It is an arithmetic number, because the mean of its divisors is an integer number (1752960).

Almost surely, 2^23120321 is an apocalyptic number.

It is an amenable number.

23120321 is a deficient number, since it is larger than the sum of its proper divisors (4927039).

23120321 is a wasteful number, since it uses less digits than its factorization.

23120321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484.

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

The square root of 23120321 is about 4808.3594915522. The cubic root of 23120321 is about 284.8817443110.

Adding to 23120321 its reverse (12302132), we get a palindrome (35422453).

The spelling of 23120321 in words is "twenty-three million, one hundred twenty thousand, three hundred twenty-one".