111221210011011 has 16 divisors (see below), whose sum is σ = 148387725761184. Its totient is φ = 74101085144064.

The previous prime is 111221210010997. The next prime is 111221210011111. The reversal of 111221210011011 is 110110012122111.

It is not a de Polignac number, because 111221210011011 - 2²⁹ = 111220673140099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111221210011111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463856691 + ... + 464096403.

It is an arithmetic number, because the mean of its divisors is an integer number (9274232860074).

Almost surely, 2^{111221210011011} is an apocalyptic number.

111221210011011 is a deficient number, since it is larger than the sum of its proper divisors (37166515750173).

111221210011011 is a wasteful number, since it uses less digits than its factorization.

111221210011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335830.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111221210011011 its reverse (110110012122111), we get a palindrome (221331222133122).

The spelling of 111221210011011 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, eleven thousand, eleven".