121111201110221 has 8 divisors (see below), whose sum is σ = 138412881372864. Its totient is φ = 103809540873600.

The previous prime is 121111201110199. The next prime is 121111201110247. The reversal of 121111201110221 is 122011102111121.

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 121111201110221 - 2⁶ = 121111201110157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121111201110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111201110281) 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, 11645021 + ... + 19437821.

It is an arithmetic number, because the mean of its divisors is an integer number (17301610171608).

Almost surely, 2^{121111201110221} is an apocalyptic number.

It is an amenable number.

121111201110221 is a deficient number, since it is larger than the sum of its proper divisors (17301680262643).

121111201110221 is an equidigital number, since it uses as much as digits as its factorization.

121111201110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10013011.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121111201110221 its reverse (122011102111121), we get a palindrome (243122303221342).

The spelling of 121111201110221 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred one million, one hundred ten thousand, two hundred twenty-one".