12202111221 has 32 divisors (see below), whose sum is σ = 17127591936. Its totient is φ = 7717248000.

The previous prime is 12202111213. The next prime is 12202111237. The reversal of 12202111221 is 12211120221.

It is not a de Polignac number, because 12202111221 - 2³ = 12202111213 is a prime.

It is a super-2 number, since 2×12202111221² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12202111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12202111241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1310101 + ... + 1319381.

It is an arithmetic number, because the mean of its divisors is an integer number (535237248).

Almost surely, 2^12202111221 is an apocalyptic number.

It is an amenable number.

12202111221 is a deficient number, since it is larger than the sum of its proper divisors (4925480715).

12202111221 is a wasteful number, since it uses less digits than its factorization.

12202111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9593.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12202111221 its reverse (12211120221), we get a palindrome (24413231442).

The spelling of 12202111221 in words is "twelve billion, two hundred two million, one hundred eleven thousand, two hundred twenty-one".