100130221 has 4 divisors (see below), whose sum is σ = 106020252. Its totient is φ = 94240192.

The previous prime is 100130213. The next prime is 100130249. The reversal of 100130221 is 122031001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122031001 = 103 ⋅1184767.

It can be written as a sum of positive squares in 2 ways, for example, as 85766121 + 14364100 = 9261^2 + 3790^2 .

It is a cyclic number.

It is not a de Polignac number, because 100130221 - 2³ = 100130213 is a prime.

It is a super-2 number, since 2×100130221² = 20052122315017682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100130198 and 100130207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100130291) 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, 2944990 + ... + 2945023.

It is an arithmetic number, because the mean of its divisors is an integer number (26505063).

Almost surely, 2^100130221 is an apocalyptic number.

It is an amenable number.

100130221 is a deficient number, since it is larger than the sum of its proper divisors (5890031).

100130221 is an equidigital number, since it uses as much as digits as its factorization.

100130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5890030.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 100130221 is about 10006.5089316904. The cubic root of 100130221 is about 464.3602734157.

Adding to 100130221 its reverse (122031001), we get a palindrome (222161222).

It can be divided in two parts, 100 and 130221, that added together give a 4-th power (130321 = 19⁴).

The spelling of 100130221 in words is "one hundred million, one hundred thirty thousand, two hundred twenty-one".