12202012001221 has 24 divisors (see below), whose sum is σ = 14718741768960. Its totient is φ = 9907727266656.

The previous prime is 12202012001213. The next prime is 12202012001227. The reversal of 12202012001221 is 12210021020221.

It is a happy number.

It is not a de Polignac number, because 12202012001221 - 2³ = 12202012001213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12202012001195 and 12202012001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12202012001227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38857975 + ... + 39170731.

It is an arithmetic number, because the mean of its divisors is an integer number (613280907040).

Almost surely, 2^{12202012001221} is an apocalyptic number.

It is an amenable number.

12202012001221 is a deficient number, since it is larger than the sum of its proper divisors (2516729767739).

12202012001221 is a wasteful number, since it uses less digits than its factorization.

12202012001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328241 (or 328222 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12202012001221 its reverse (12210021020221), we get a palindrome (24412033021442).

The spelling of 12202012001221 in words is "twelve trillion, two hundred two billion, twelve million, one thousand, two hundred twenty-one".