130224821 has 2 divisors, whose sum is σ = 130224822. Its totient is φ = 130224820.

The previous prime is 130224799. The next prime is 130224823. The reversal of 130224821 is 128422031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108972721 + 21252100 = 10439^2 + 4610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130224821 is a prime.

Together with 130224823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130224823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65112410 + 65112411.

It is an arithmetic number, because the mean of its divisors is an integer number (65112411).

Almost surely, 2^130224821 is an apocalyptic number.

It is an amenable number.

130224821 is a deficient number, since it is larger than the sum of its proper divisors (1).

130224821 is an equidigital number, since it uses as much as digits as its factorization.

130224821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 130224821 is about 11411.6090451785. The cubic root of 130224821 is about 506.8715587429.

Adding to 130224821 its reverse (128422031), we get a palindrome (258646852).

The spelling of 130224821 in words is "one hundred thirty million, two hundred twenty-four thousand, eight hundred twenty-one".