111101221011 has 48 divisors (see below), whose sum is σ = 166547017728. Its totient is φ = 65333001600.

The previous prime is 111101221003. The next prime is 111101221019. The reversal of 111101221011 is 110122101111.

It is an interprime number because it is at equal distance from previous prime (111101221003) and next prime (111101221019).

It is not a de Polignac number, because 111101221011 - 2³ = 111101221003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111101221019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17299581 + ... + 17306001.

It is an arithmetic number, because the mean of its divisors is an integer number (3469729536).

Almost surely, 2^111101221011 is an apocalyptic number.

111101221011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111101221011 is a deficient number, since it is larger than the sum of its proper divisors (55445796717).

111101221011 is a wasteful number, since it uses less digits than its factorization.

111101221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6892 (or 6855 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111101221011 its reverse (110122101111), we get a palindrome (221223322122).

It can be divided in two parts, 11 and 1101221011, that multiplied together give a palindrome (12113431121).

The spelling of 111101221011 in words is "one hundred eleven billion, one hundred one million, two hundred twenty-one thousand, eleven".