12221212232 has 8 divisors (see below), whose sum is σ = 22914772950. Its totient is φ = 6110606112.

The previous prime is 12221212187. The next prime is 12221212247. The reversal of 12221212232 is 23221212221.

It can be written as a sum of positive squares in only one way, i.e., 8631524836 + 3589687396 = 92906^2 + 59914^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 763825757 + ... + 763825772.

Almost surely, 2^12221212232 is an apocalyptic number.

It is an amenable number.

12221212232 is a deficient number, since it is larger than the sum of its proper divisors (10693560718).

12221212232 is a wasteful number, since it uses less digits than its factorization.

12221212232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527651535 (or 1527651531 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

Adding to 12221212232 its reverse (23221212221), we get a palindrome (35442424453).

The spelling of 12221212232 in words is "twelve billion, two hundred twenty-one million, two hundred twelve thousand, two hundred thirty-two".