111220102011 has 16 divisors (see below), whose sum is σ = 152337957408. Its totient is φ = 72125452800.

The previous prime is 111220101977. The next prime is 111220102013. The reversal of 111220102011 is 110201022111.

It is not a de Polignac number, because 111220102011 - 2³⁴ = 94040232827 is a prime.

It is a super-2 number, since 2×111220102011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111220102013) 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, 352621 + ... + 588881.

It is an arithmetic number, because the mean of its divisors is an integer number (9521122338).

Almost surely, 2^111220102011 is an apocalyptic number.

111220102011 is a deficient number, since it is larger than the sum of its proper divisors (41117855397).

111220102011 is a wasteful number, since it uses less digits than its factorization.

111220102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240542.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111220102011 its reverse (110201022111), we get a palindrome (221421124122).

The spelling of 111220102011 in words is "one hundred eleven billion, two hundred twenty million, one hundred two thousand, eleven".