100130121221 has 4 divisors (see below), whose sum is σ = 107832438252. Its totient is φ = 92427804192.

The previous prime is 100130121209. The next prime is 100130121251. The reversal of 100130121221 is 122121031001.

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 9460480225 + 90669640996 = 97265^2 + 301114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100130121221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100130121196 and 100130121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100130121251) 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, 3851158496 + ... + 3851158521.

It is an arithmetic number, because the mean of its divisors is an integer number (26958109563).

Almost surely, 2^100130121221 is an apocalyptic number.

It is an amenable number.

100130121221 is a deficient number, since it is larger than the sum of its proper divisors (7702317031).

100130121221 is an equidigital number, since it uses as much as digits as its factorization.

100130121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7702317030.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 100130121221 its reverse (122121031001), we get a palindrome (222251152222).

The spelling of 100130121221 in words is "one hundred billion, one hundred thirty million, one hundred twenty-one thousand, two hundred twenty-one".