12202011221 has 4 divisors (see below), whose sum is σ = 12732533472. Its totient is φ = 11671488972.

The previous prime is 12202011209. The next prime is 12202011317. The reversal of 12202011221 is 12211020221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12202011221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12202011196 and 12202011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12202011121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265261091 + ... + 265261136.

It is an arithmetic number, because the mean of its divisors is an integer number (3183133368).

Almost surely, 2^12202011221 is an apocalyptic number.

It is an amenable number.

12202011221 is a deficient number, since it is larger than the sum of its proper divisors (530522251).

12202011221 is an equidigital number, since it uses as much as digits as its factorization.

12202011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530522250.

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

Adding to 12202011221 its reverse (12211020221), we get a palindrome (24413031442).

The spelling of 12202011221 in words is "twelve billion, two hundred two million, eleven thousand, two hundred twenty-one".