111221042201 has 4 divisors (see below), whose sum is σ = 116056739712. Its totient is φ = 106385344692.

The previous prime is 111221042183. The next prime is 111221042221. The reversal of 111221042201 is 102240122111.

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-111221042201 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 111221042201.

It is not an unprimeable number, because it can be changed into a prime (111221042221) 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, 2417848721 + ... + 2417848766.

It is an arithmetic number, because the mean of its divisors is an integer number (29014184928).

Almost surely, 2^111221042201 is an apocalyptic number.

It is an amenable number.

111221042201 is a deficient number, since it is larger than the sum of its proper divisors (4835697511).

111221042201 is an equidigital number, since it uses as much as digits as its factorization.

111221042201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4835697510.

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

Adding to 111221042201 its reverse (102240122111), we get a palindrome (213461164312).

The spelling of 111221042201 in words is "one hundred eleven billion, two hundred twenty-one million, forty-two thousand, two hundred one".