111220201202111 has 4 divisors (see below), whose sum is σ = 111492133234800. Its totient is φ = 110948269169424.

The previous prime is 111220201202069. The next prime is 111220201202129. The reversal of 111220201202111 is 111202102022111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111220201202111 - 2³⁴ = 111203021332927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111220201202111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220201204111) 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, 135966015731 + ... + 135966016548.

It is an arithmetic number, because the mean of its divisors is an integer number (27873033308700).

Almost surely, 2^{111220201202111} is an apocalyptic number.

111220201202111 is a deficient number, since it is larger than the sum of its proper divisors (271932032689).

111220201202111 is an equidigital number, since it uses as much as digits as its factorization.

111220201202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271932032688.

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

Adding to 111220201202111 its reverse (111202102022111), we get a palindrome (222422303224222).

The spelling of 111220201202111 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred one million, two hundred two thousand, one hundred eleven".