12033221331 has 16 divisors (see below), whose sum is σ = 16116054944. Its totient is φ = 7986345984.

The previous prime is 12033221329. The next prime is 12033221357. The reversal of 12033221331 is 13312233021.

It is not a de Polignac number, because 12033221331 - 2¹ = 12033221329 is a prime.

It is a super-2 number, since 2×12033221331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12033221298 and 12033221307.

It is not an unprimeable number, because it can be changed into a prime (12033221731) 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, 636345 + ... + 654981.

It is an arithmetic number, because the mean of its divisors is an integer number (1007253434).

Almost surely, 2^12033221331 is an apocalyptic number.

12033221331 is a deficient number, since it is larger than the sum of its proper divisors (4082833613).

12033221331 is a wasteful number, since it uses less digits than its factorization.

12033221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19590.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 12033221331 its reverse (13312233021), we get a palindrome (25345454352).

The spelling of 12033221331 in words is "twelve billion, thirty-three million, two hundred twenty-one thousand, three hundred thirty-one".