111121112011 has 16 divisors (see below), whose sum is σ = 136920489664. Its totient is φ = 87819686784.

The previous prime is 111121112009. The next prime is 111121112027. The reversal of 111121112011 is 110211121111.

It is a cyclic number.

It is not a de Polignac number, because 111121112011 - 2¹ = 111121112009 is a prime.

It is a super-2 number, since 2×111121112011² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 111121111982 and 111121112000.

It is not an unprimeable number, because it can be changed into a prime (111121152011) 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, 616380 + ... + 775993.

It is an arithmetic number, because the mean of its divisors is an integer number (8557530604).

Almost surely, 2^111121112011 is an apocalyptic number.

111121112011 is a deficient number, since it is larger than the sum of its proper divisors (25799377653).

111121112011 is a wasteful number, since it uses less digits than its factorization.

111121112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393270.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 111121112011 its reverse (110211121111), we get a palindrome (221332233122).

The spelling of 111121112011 in words is "one hundred eleven billion, one hundred twenty-one million, one hundred twelve thousand, eleven".