111222211101001 has 96 divisors (see below), whose sum is σ = 152674865296128. Its totient is φ = 78832353600000.

The previous prime is 111222211100999. The next prime is 111222211101007. The reversal of 111222211101001 is 100101112222111.

It is not a de Polignac number, because 111222211101001 - 2¹ = 111222211100999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111222211101007) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 234418431 + ... + 234892411.

It is an arithmetic number, because the mean of its divisors is an integer number (1590363180168).

Almost surely, 2^{111222211101001} is an apocalyptic number.

111222211101001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111222211101001 is a deficient number, since it is larger than the sum of its proper divisors (41452654195127).

111222211101001 is a wasteful number, since it uses less digits than its factorization.

111222211101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474335 (or 474324 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 111222211101001 its reverse (100101112222111), we get a palindrome (211323323323112).

It can be divided in two parts, 11122221110 and 1001, that added together give a palindrome (11122222111).

The spelling of 111222211101001 in words is "one hundred eleven trillion, two hundred twenty-two billion, two hundred eleven million, one hundred one thousand, one".