100110001022221 has 4 divisors (see below), whose sum is σ = 100120815550332. Its totient is φ = 100099186494112.

The previous prime is 100110001022209. The next prime is 100110001022257. The reversal of 100110001022221 is 122220100011001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45048406899721 + 55061594122500 = 6711811^2 + 7420350^2 .

It is a cyclic number.

It is not a de Polignac number, because 100110001022221 - 2¹⁹ = 100110000497933 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 (100110001022821) 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, 5407250170 + ... + 5407268683.

It is an arithmetic number, because the mean of its divisors is an integer number (25030203887583).

Almost surely, 2^{100110001022221} is an apocalyptic number.

It is an amenable number.

100110001022221 is a deficient number, since it is larger than the sum of its proper divisors (10814528111).

100110001022221 is an equidigital number, since it uses as much as digits as its factorization.

100110001022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10814528110.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100110001022221 its reverse (122220100011001), we get a palindrome (222330101033222).

The spelling of 100110001022221 in words is "one hundred trillion, one hundred ten billion, one million, twenty-two thousand, two hundred twenty-one".