12221322132 has 12 divisors (see below), whose sum is σ = 28516418336. Its totient is φ = 4073774040.

The previous prime is 12221322103. The next prime is 12221322167. The reversal of 12221322132 is 23122312221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×12221322132² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12221322099 and 12221322108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509221744 + ... + 509221767.

Almost surely, 2^12221322132 is an apocalyptic number.

12221322132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221322132 is an abundant number, since it is smaller than the sum of its proper divisors (16295096204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221322132 is a wasteful number, since it uses less digits than its factorization.

12221322132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018443518 (or 1018443516 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

Adding to 12221322132 its reverse (23122312221), we get a palindrome (35343634353).

The spelling of 12221322132 in words is "twelve billion, two hundred twenty-one million, three hundred twenty-two thousand, one hundred thirty-two".