111021212211 has 32 divisors (see below), whose sum is σ = 187112690688. Its totient is φ = 56977914240.

The previous prime is 111021212207. The next prime is 111021212213. The reversal of 111021212211 is 112212120111.

It is a happy number.

It is not a de Polignac number, because 111021212211 - 2² = 111021212207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111021212213) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5485455 + ... + 5505656.

It is an arithmetic number, because the mean of its divisors is an integer number (5847271584).

Almost surely, 2^111021212211 is an apocalyptic number.

111021212211 is a deficient number, since it is larger than the sum of its proper divisors (76091478477).

111021212211 is a wasteful number, since it uses less digits than its factorization.

111021212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10991171.

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

Adding to 111021212211 its reverse (112212120111), we get a palindrome (223233332322).

The spelling of 111021212211 in words is "one hundred eleven billion, twenty-one million, two hundred twelve thousand, two hundred eleven".