111111001011 has 12 divisors (see below), whose sum is σ = 162692212488. Its totient is φ = 73059287904.

The previous prime is 111111001003. The next prime is 111111001013. The reversal of 111111001011 is 110100111111.

It is not a de Polignac number, because 111111001011 - 2³ = 111111001003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 111111000984 and 111111001002.

It is not an unprimeable number, because it can be changed into a prime (111111001013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84558705 + ... + 84560018.

It is an arithmetic number, because the mean of its divisors is an integer number (13557684374).

Almost surely, 2^111111001011 is an apocalyptic number.

111111001011 is a deficient number, since it is larger than the sum of its proper divisors (51581211477).

111111001011 is a wasteful number, since it uses less digits than its factorization.

111111001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169118802 (or 169118799 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 111111001011 its reverse (110100111111), we get a palindrome (221211112122).

The spelling of 111111001011 in words is "one hundred eleven billion, one hundred eleven million, one thousand, eleven".