111201201111 has 48 divisors (see below), whose sum is σ = 200581670912. Its totient is φ = 53323237440.

The previous prime is 111201201019. The next prime is 111201201149. The reversal of 111201201111 is 111102102111.

It is not a de Polignac number, because 111201201111 - 2¹⁰ = 111201200087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201201311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1650151 + ... + 1716216.

Almost surely, 2^111201201111 is an apocalyptic number.

111201201111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111201201111 is a deficient number, since it is larger than the sum of its proper divisors (89380469801).

111201201111 is a wasteful number, since it uses less digits than its factorization.

111201201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366412 (or 3366401 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111201201111 its reverse (111102102111), we get a palindrome (222303303222).

The spelling of 111201201111 in words is "one hundred eleven billion, two hundred one million, two hundred one thousand, one hundred eleven".