111220201200221 has 8 divisors (see below), whose sum is σ = 112353036209400. Its totient is φ = 110092018491648.

The previous prime is 111220201200179. The next prime is 111220201200233. The reversal of 111220201200221 is 122002102022111.

It can be written as a sum of positive squares in 4 ways, for example, as 18727472625625 + 92492728574596 = 4327525^2 + 9617314^2 .

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 111220201200221 - 2¹⁴ = 111220201183837 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 111220201200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220201100221) 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, 1163027096 + ... + 1163122721.

It is an arithmetic number, because the mean of its divisors is an integer number (14044129526175).

Almost surely, 2^{111220201200221} is an apocalyptic number.

It is an amenable number.

111220201200221 is a deficient number, since it is larger than the sum of its proper divisors (1132835009179).

111220201200221 is a wasteful number, since it uses less digits than its factorization.

111220201200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326150303.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111220201200221 its reverse (122002102022111), we get a palindrome (233222303222332).

The spelling of 111220201200221 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred one million, two hundred thousand, two hundred twenty-one".