1220201100111 has 16 divisors (see below), whose sum is σ = 1877763506688. Its totient is φ = 690354228000.

The previous prime is 1220201100109. The next prime is 1220201100119. The reversal of 1220201100111 is 1110011020221.

It is not a de Polignac number, because 1220201100111 - 2¹ = 1220201100109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220201100119) 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, 287645475 + ... + 287649716.

It is an arithmetic number, because the mean of its divisors is an integer number (117360219168).

Almost surely, 2^{1220201100111} is an apocalyptic number.

1220201100111 is a deficient number, since it is larger than the sum of its proper divisors (657562406577).

1220201100111 is a wasteful number, since it uses less digits than its factorization.

1220201100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575295302.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1220201100111 its reverse (1110011020221), we get a palindrome (2330212120332).

The spelling of 1220201100111 in words is "one trillion, two hundred twenty billion, two hundred one million, one hundred thousand, one hundred eleven".