11111022011 has 4 divisors (see below), whose sum is σ = 11111256624. Its totient is φ = 11110787400.

The previous prime is 11111022001. The next prime is 11111022029. The reversal of 11111022011 is 11022011111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11111022011 - 2⁶ = 11111021947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111021983 and 11111022001.

It is not an unprimeable number, because it can be changed into a prime (11111022001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18560 + ... + 150221.

It is an arithmetic number, because the mean of its divisors is an integer number (2777814156).

Almost surely, 2^11111022011 is an apocalyptic number.

11111022011 is a deficient number, since it is larger than the sum of its proper divisors (234613).

11111022011 is an equidigital number, since it uses as much as digits as its factorization.

11111022011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234612.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11111022011 its reverse (11022011111), we get a palindrome (22133033122).

It can be divided in two parts, 111 and 11022011, that multiplied together give a palindrome (1223443221).

The spelling of 11111022011 in words is "eleven billion, one hundred eleven million, twenty-two thousand, eleven".