111221100001 has 8 divisors (see below), whose sum is σ = 123913643904. Its totient is φ = 98958811920.

The previous prime is 111221099993. The next prime is 111221100017. The reversal of 111221100001 is 100001122111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111221100001 - 2³ = 111221099993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221100301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107563410 + ... + 107564443.

It is an arithmetic number, because the mean of its divisors is an integer number (15489205488).

Almost surely, 2^111221100001 is an apocalyptic number.

111221100001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111221100001 is a deficient number, since it is larger than the sum of its proper divisors (12692543903).

111221100001 is a wasteful number, since it uses less digits than its factorization.

111221100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215127911.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111221100001 its reverse (100001122111), we get a palindrome (211222222112).

The spelling of 111221100001 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred thousand, one".