111201202101221 has 16 divisors (see below), whose sum is σ = 111582778245120. Its totient is φ = 110820488168880.

The previous prime is 111201202101161. The next prime is 111201202101263. The reversal of 111201202101221 is 122101202102111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111201202101221 is a prime.

It is a Duffinian number.

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 111201202101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201202106221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 699479540 + ... + 699638498.

It is an arithmetic number, because the mean of its divisors is an integer number (6973923640320).

Almost surely, 2^{111201202101221} is an apocalyptic number.

It is an amenable number.

111201202101221 is a deficient number, since it is larger than the sum of its proper divisors (381576143899).

111201202101221 is a wasteful number, since it uses less digits than its factorization.

111201202101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161656.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111201202101221 its reverse (122101202102111), we get a palindrome (233302404203332).

The spelling of 111201202101221 in words is "one hundred eleven trillion, two hundred one billion, two hundred two million, one hundred one thousand, two hundred twenty-one".