130232221 has 4 divisors (see below), whose sum is σ = 148836832. Its totient is φ = 111627612.

The previous prime is 130232173. The next prime is 130232227. The reversal of 130232221 is 122232031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122232031 = 431 ⋅283601.

It is a cyclic number.

It is not a de Polignac number, because 130232221 - 2⁷ = 130232093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130232195 and 130232204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130232227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9302295 + ... + 9302308.

It is an arithmetic number, because the mean of its divisors is an integer number (37209208).

Almost surely, 2^130232221 is an apocalyptic number.

It is an amenable number.

130232221 is a deficient number, since it is larger than the sum of its proper divisors (18604611).

130232221 is an equidigital number, since it uses as much as digits as its factorization.

130232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18604610.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 130232221 is about 11411.9332717993. The cubic root of 130232221 is about 506.8811595202.

Adding to 130232221 its reverse (122232031), we get a palindrome (252464252).

The spelling of 130232221 in words is "one hundred thirty million, two hundred thirty-two thousand, two hundred twenty-one".