12032213121 has 10 divisors (see below), whose sum is σ = 17974046882. Its totient is φ = 8021475360.

The previous prime is 12032213111. The next prime is 12032213153. The reversal of 12032213121 is 12131223021.

It can be written as a sum of positive squares in only one way, i.e., 10786899600 + 1245313521 = 103860^2 + 35289^2 .

It is not a de Polignac number, because 12032213121 - 2⁶ = 12032213057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12032213094 and 12032213103.

It is not an unprimeable number, because it can be changed into a prime (12032213111) 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, 74272840 + ... + 74273001.

Almost surely, 2^12032213121 is an apocalyptic number.

It is an amenable number.

12032213121 is a deficient number, since it is larger than the sum of its proper divisors (5941833761).

12032213121 is an equidigital number, since it uses as much as digits as its factorization.

12032213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148545853 (or 148545844 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12032213121 its reverse (12131223021), we get a palindrome (24163436142).

The spelling of 12032213121 in words is "twelve billion, thirty-two million, two hundred thirteen thousand, one hundred twenty-one".