12211111012 has 6 divisors (see below), whose sum is σ = 21369444278. Its totient is φ = 6105555504.

The previous prime is 12211110979. The next prime is 12211111021. The reversal of 12211111012 is 21011111221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9782001216 + 2429109796 = 98904^2 + 49286^2 .

It is a super-2 number, since 2×12211111012² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211110983 and 12211111001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1526388873 + ... + 1526388880.

Almost surely, 2^12211111012 is an apocalyptic number.

It is an amenable number.

12211111012 is a deficient number, since it is larger than the sum of its proper divisors (9158333266).

12211111012 is a wasteful number, since it uses less digits than its factorization.

12211111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3052777757 (or 3052777755 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12211111012 its reverse (21011111221), we get a palindrome (33222222233).

The spelling of 12211111012 in words is "twelve billion, two hundred eleven million, one hundred eleven thousand, twelve".