100100001120221 has 4 divisors (see below), whose sum is σ = 105988236480252. Its totient is φ = 94211765760192.

The previous prime is 100100001120193. The next prime is 100100001120241. The reversal of 100100001120221 is 122021100001001.

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 56772156172900 + 43327844947321 = 7534730^2 + 6582389^2 .

It is a cyclic number.

It is not a de Polignac number, because 100100001120221 - 2⁶ = 100100001120157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100100001120241) 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, 2944117679990 + ... + 2944117680023.

It is an arithmetic number, because the mean of its divisors is an integer number (26497059120063).

Almost surely, 2^{100100001120221} is an apocalyptic number.

It is an amenable number.

100100001120221 is a deficient number, since it is larger than the sum of its proper divisors (5888235360031).

100100001120221 is an equidigital number, since it uses as much as digits as its factorization.

100100001120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5888235360030.

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

Adding to 100100001120221 its reverse (122021100001001), we get a palindrome (222121101121222).

The spelling of 100100001120221 in words is "one hundred trillion, one hundred billion, one million, one hundred twenty thousand, two hundred twenty-one".