111111021011 has 8 divisors (see below), whose sum is σ = 115968113664. Its totient is φ = 106256109960.

The previous prime is 111111020959. The next prime is 111111021017. The reversal of 111111021011 is 110120111111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111111021011 - 2²² = 111106826707 is a prime.

It is a super-3 number, since 3×111111021011³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111111020983 and 111111021001.

It is not an unprimeable number, because it can be changed into a prime (111111021017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440885 + ... + 645446.

It is an arithmetic number, because the mean of its divisors is an integer number (14496014208).

Almost surely, 2^111111021011 is an apocalyptic number.

111111021011 is a deficient number, since it is larger than the sum of its proper divisors (4857092653).

111111021011 is a wasteful number, since it uses less digits than its factorization.

111111021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090801.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 111111021011 its reverse (110120111111), we get a palindrome (221231132122).

The spelling of 111111021011 in words is "one hundred eleven billion, one hundred eleven million, twenty-one thousand, eleven".