12153321 has 10 divisors (see below), whose sum is σ = 18155082. Its totient is φ = 8102160.

The previous prime is 12153313. The next prime is 12153341. The reversal of 12153321 is 12335121.

It can be written as a sum of positive squares in only one way, i.e., 11634921 + 518400 = 3411^2 + 720^2 .

It is not a de Polignac number, because 12153321 - 2³ = 12153313 is a prime.

It is a super-2 number, since 2×12153321² = 295406422658082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12153294 and 12153303.

It is not an unprimeable number, because it can be changed into a prime (12153341) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 74940 + ... + 75101.

Almost surely, 2^12153321 is an apocalyptic number.

It is an amenable number.

12153321 is a deficient number, since it is larger than the sum of its proper divisors (6001761).

12153321 is an equidigital number, since it uses as much as digits as its factorization.

12153321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150053 (or 150044 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 12153321 is about 3486.1613559903. The cubic root of 12153321 is about 229.9137736011.

Adding to 12153321 its reverse (12335121), we get a palindrome (24488442).

The spelling of 12153321 in words is "twelve million, one hundred fifty-three thousand, three hundred twenty-one".