130203221 has 4 divisors (see below), whose sum is σ = 137862252. Its totient is φ = 122544192.

The previous prime is 130203209. The next prime is 130203239. The reversal of 130203221 is 122302031.

It is a happy number.

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 73788100 + 56415121 = 8590^2 + 7511^2 .

It is a cyclic number.

It is not a de Polignac number, because 130203221 - 2²⁶ = 63094357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130203196 and 130203205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130203251) 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, 3829490 + ... + 3829523.

It is an arithmetic number, because the mean of its divisors is an integer number (34465563).

Almost surely, 2^130203221 is an apocalyptic number.

It is an amenable number.

130203221 is a deficient number, since it is larger than the sum of its proper divisors (7659031).

130203221 is an equidigital number, since it uses as much as digits as its factorization.

130203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7659030.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 130203221 is about 11410.6626012690. The cubic root of 130203221 is about 506.8435327722.

Adding to 130203221 its reverse (122302031), we get a palindrome (252505252).

The spelling of 130203221 in words is "one hundred thirty million, two hundred three thousand, two hundred twenty-one".