100001100120221 has 4 divisors (see below), whose sum is σ = 103449413917500. Its totient is φ = 96552786322944.

The previous prime is 100001100120203. The next prime is 100001100120293. The reversal of 100001100120221 is 122021001100001.

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 65709992068900 + 34291108051321 = 8106170^2 + 5855861^2 .

It is a cyclic number.

It is not a de Polignac number, because 100001100120221 - 2³⁰ = 100000026378397 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 (100001100120121) 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, 1724156898596 + ... + 1724156898653.

It is an arithmetic number, because the mean of its divisors is an integer number (25862353479375).

Almost surely, 2^{100001100120221} is an apocalyptic number.

It is an amenable number.

100001100120221 is a deficient number, since it is larger than the sum of its proper divisors (3448313797279).

100001100120221 is an equidigital number, since it uses as much as digits as its factorization.

100001100120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3448313797278.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100001100120221 its reverse (122021001100001), we get a palindrome (222022101220222).

The spelling of 100001100120221 in words is "one hundred trillion, one billion, one hundred million, one hundred twenty thousand, two hundred twenty-one".