20120232321 has 24 divisors (see below), whose sum is σ = 33543217344. Its totient is φ = 11383437600.

The previous prime is 20120232299. The next prime is 20120232337. The reversal of 20120232321 is 12323202102.

It is not a de Polignac number, because 20120232321 - 2¹⁰ = 20120231297 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20120232294 and 20120232303.

It is not an unprimeable number, because it can be changed into a prime (20120232361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1574671 + ... + 1587396.

It is an arithmetic number, because the mean of its divisors is an integer number (1397634056).

Almost surely, 2^20120232321 is an apocalyptic number.

20120232321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20120232321 is a deficient number, since it is larger than the sum of its proper divisors (13422985023).

20120232321 is a wasteful number, since it uses less digits than its factorization.

20120232321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162181 (or 3162178 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20120232321 its reverse (12323202102), we get a palindrome (32443434423).

The spelling of 20120232321 in words is "twenty billion, one hundred twenty million, two hundred thirty-two thousand, three hundred twenty-one".