12211220012 has 6 divisors (see below), whose sum is σ = 21369635028. Its totient is φ = 6105610004.

The previous prime is 12211220011. The next prime is 12211220033. The reversal of 12211220012 is 21002211221.

It is a super-2 number, since 2×12211220012² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12211220011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1526402498 + ... + 1526402505.

It is an arithmetic number, because the mean of its divisors is an integer number (3561605838).

Almost surely, 2^12211220012 is an apocalyptic number.

It is an amenable number.

12211220012 is a deficient number, since it is larger than the sum of its proper divisors (9158415016).

12211220012 is a wasteful number, since it uses less digits than its factorization.

12211220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052805007 (or 3052805005 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12211220012 its reverse (21002211221), we get a palindrome (33213431233).

The spelling of 12211220012 in words is "twelve billion, two hundred eleven million, two hundred twenty thousand, twelve".