111122122001 has 16 divisors (see below), whose sum is σ = 122726596608. Its totient is φ = 99768891600.

The previous prime is 111122121997. The next prime is 111122122009. The reversal of 111122122001 is 100221221111.

It is a cyclic number.

It is not a de Polignac number, because 111122122001 - 2² = 111122121997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111122122009) 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, 2872256 + ... + 2910686.

It is an arithmetic number, because the mean of its divisors is an integer number (7670412288).

Almost surely, 2^111122122001 is an apocalyptic number.

111122122001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111122122001 is a deficient number, since it is larger than the sum of its proper divisors (11604474607).

111122122001 is a wasteful number, since it uses less digits than its factorization.

111122122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41692.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111122122001 its reverse (100221221111), we get a palindrome (211343343112).

The spelling of 111122122001 in words is "one hundred eleven billion, one hundred twenty-two million, one hundred twenty-two thousand, one".