12201121012 has 12 divisors (see below), whose sum is σ = 21644454916. Its totient is φ = 6016991040.

The previous prime is 12201121007. The next prime is 12201121021. The reversal of 12201121012 is 21012110221.

It can be written as a sum of positive squares in 2 ways, for example, as 5860821136 + 6340299876 = 76556^2 + 79626^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12201120983 and 12201121001.

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, 20892039 + ... + 20892622.

Almost surely, 2^12201121012 is an apocalyptic number.

It is an amenable number.

12201121012 is a deficient number, since it is larger than the sum of its proper divisors (9443333904).

12201121012 is a wasteful number, since it uses less digits than its factorization.

12201121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41784738 (or 41784736 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12201121012 its reverse (21012110221), we get a palindrome (33213231233).

The spelling of 12201121012 in words is "twelve billion, two hundred one million, one hundred twenty-one thousand, twelve".