111211022212 has 12 divisors (see below), whose sum is σ = 206067482460. Its totient is φ = 52334598656.

The previous prime is 111211022207. The next prime is 111211022227. The reversal of 111211022212 is 212220112111.

It can be written as a sum of positive squares in 2 ways, for example, as 98254663936 + 12956358276 = 313456^2 + 113826^2 .

It is a super-2 number, since 2×111211022212² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817728037 + ... + 817728172.

It is an arithmetic number, because the mean of its divisors is an integer number (17172290205).

Almost surely, 2^111211022212 is an apocalyptic number.

It is an amenable number.

111211022212 is a deficient number, since it is larger than the sum of its proper divisors (94856460248).

111211022212 is a wasteful number, since it uses less digits than its factorization.

111211022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635456230 (or 1635456228 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111211022212 its reverse (212220112111), we get a palindrome (323431134323).

The spelling of 111211022212 in words is "one hundred eleven billion, two hundred eleven million, twenty-two thousand, two hundred twelve".