111011220101001 has 16 divisors (see below), whose sum is σ = 165834943051968. Its totient is φ = 65461161729600.

The previous prime is 111011220100997. The next prime is 111011220101039. The reversal of 111011220101001 is 100101022110111.

It is not a de Polignac number, because 111011220101001 - 2² = 111011220100997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111011220101401) 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, 45459138870 + ... + 45459141311.

It is an arithmetic number, because the mean of its divisors is an integer number (10364683940748).

Almost surely, 2^{111011220101001} is an apocalyptic number.

111011220101001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111011220101001 is a deficient number, since it is larger than the sum of its proper divisors (54823722950967).

111011220101001 is a wasteful number, since it uses less digits than its factorization.

111011220101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90918280232.

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

Adding to 111011220101001 its reverse (100101022110111), we get a palindrome (211112242211112).

The spelling of 111011220101001 in words is "one hundred eleven trillion, eleven billion, two hundred twenty million, one hundred one thousand, one".