111220211101 has 4 divisors (see below), whose sum is σ = 111315191104. Its totient is φ = 111125231100.

The previous prime is 111220211059. The next prime is 111220211131. The reversal of 111220211101 is 101112022111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111220211101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220211131) 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, 47488245 + ... + 47490586.

It is an arithmetic number, because the mean of its divisors is an integer number (27828797776).

Almost surely, 2^111220211101 is an apocalyptic number.

It is an amenable number.

111220211101 is a deficient number, since it is larger than the sum of its proper divisors (94980003).

111220211101 is an equidigital number, since it uses as much as digits as its factorization.

111220211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94980002.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111220211101 its reverse (101112022111), we get a palindrome (212332233212).

The spelling of 111220211101 in words is "one hundred eleven billion, two hundred twenty million, two hundred eleven thousand, one hundred one".