100001101112221 has 4 divisors (see below), whose sum is σ = 100037879747200. Its totient is φ = 99964322477244.

The previous prime is 100001101112197. The next prime is 100001101112261. The reversal of 100001101112221 is 122211101100001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100001101112221 - 2¹⁷ = 100001100981149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001101112261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18389313411 + ... + 18389318848.

It is an arithmetic number, because the mean of its divisors is an integer number (25009469936800).

Almost surely, 2^{100001101112221} is an apocalyptic number.

It is an amenable number.

100001101112221 is a deficient number, since it is larger than the sum of its proper divisors (36778634979).

100001101112221 is an equidigital number, since it uses as much as digits as its factorization.

100001101112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36778634978.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 100001101112221 its reverse (122211101100001), we get a palindrome (222212202212222).

The spelling of 100001101112221 in words is "one hundred trillion, one billion, one hundred one million, one hundred twelve thousand, two hundred twenty-one".