111201221211 has 8 divisors (see below), whose sum is σ = 148305258000. Its totient is φ = 74115665952.

The previous prime is 111201221191. The next prime is 111201221231. The reversal of 111201221211 is 112122102111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111201221191) and next prime (111201221231).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111201221211 - 2¹⁴ = 111201204827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111201221231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4606336 + ... + 4630413.

It is an arithmetic number, because the mean of its divisors is an integer number (18538157250).

Almost surely, 2^111201221211 is an apocalyptic number.

111201221211 is a deficient number, since it is larger than the sum of its proper divisors (37104036789).

111201221211 is an equidigital number, since it uses as much as digits as its factorization.

111201221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9240765.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111201221211 its reverse (112122102111), we get a palindrome (223323323322).

The spelling of 111201221211 in words is "one hundred eleven billion, two hundred one million, two hundred twenty-one thousand, two hundred eleven".