12201220121 has 8 divisors (see below), whose sum is σ = 12385215360. Its totient is φ = 12017280528.

The previous prime is 12201220117. The next prime is 12201220123. The reversal of 12201220121 is 12102210221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12201220121 - 2² = 12201220117 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 = 12201220096 and 12201220105.

It is not an unprimeable number, because it can be changed into a prime (12201220123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704255 + ... + 721371.

It is an arithmetic number, because the mean of its divisors is an integer number (1548151920).

Almost surely, 2^12201220121 is an apocalyptic number.

It is an amenable number.

12201220121 is a deficient number, since it is larger than the sum of its proper divisors (183995239).

12201220121 is a wasteful number, since it uses less digits than its factorization.

12201220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27823.

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

Adding to 12201220121 its reverse (12102210221), we get a palindrome (24303430342).

The spelling of 12201220121 in words is "twelve billion, two hundred one million, two hundred twenty thousand, one hundred twenty-one".