111212102211 has 12 divisors (see below), whose sum is σ = 172492240392. Its totient is φ = 63549772608.

The previous prime is 111212102179. The next prime is 111212102213. The reversal of 111212102211 is 112201212111.

It is a happy number.

It is not a de Polignac number, because 111212102211 - 2⁵ = 111212102179 is a prime.

It is a super-2 number, since 2×111212102211² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111212102213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 378272310 + ... + 378272603.

It is an arithmetic number, because the mean of its divisors is an integer number (14374353366).

Almost surely, 2^111212102211 is an apocalyptic number.

111212102211 is a deficient number, since it is larger than the sum of its proper divisors (61280138181).

111212102211 is an equidigital number, since it uses as much as digits as its factorization.

111212102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756544930 (or 756544923 counting only the distinct ones).

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

Adding to 111212102211 its reverse (112201212111), we get a palindrome (223413314322).

The spelling of 111212102211 in words is "one hundred eleven billion, two hundred twelve million, one hundred two thousand, two hundred eleven".