12201202121 has 4 divisors (see below), whose sum is σ = 12214958592. Its totient is φ = 12187445652.

The previous prime is 12201202063. The next prime is 12201202157. The reversal of 12201202121 is 12120210221.

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-12201202121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12201202096 and 12201202105.

It is not an unprimeable number, because it can be changed into a prime (12201202171) 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, 6876905 + ... + 6878678.

It is an arithmetic number, because the mean of its divisors is an integer number (3053739648).

Almost surely, 2^12201202121 is an apocalyptic number.

It is an amenable number.

12201202121 is a deficient number, since it is larger than the sum of its proper divisors (13756471).

12201202121 is an equidigital number, since it uses as much as digits as its factorization.

12201202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13756470.

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

Adding to 12201202121 its reverse (12120210221), we get a palindrome (24321412342).

The spelling of 12201202121 in words is "twelve billion, two hundred one million, two hundred two thousand, one hundred twenty-one".