111222121011 has 8 divisors (see below), whose sum is σ = 148425007104. Its totient is φ = 74083657800.

The previous prime is 111222121001. The next prime is 111222121013. The reversal of 111222121011 is 110121222111.

It is a happy number.

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

It is not a de Polignac number, because 111222121011 - 2¹¹ = 111222118963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111222121013) 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, 16101691 + ... + 16108596.

It is an arithmetic number, because the mean of its divisors is an integer number (18553125888).

Almost surely, 2^111222121011 is an apocalyptic number.

111222121011 is a deficient number, since it is larger than the sum of its proper divisors (37202886093).

111222121011 is a wasteful number, since it uses less digits than its factorization.

111222121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32211441.

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

Adding to 111222121011 its reverse (110121222111), we get a palindrome (221343343122).

The spelling of 111222121011 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, eleven".