221322130023251 has 2 divisors, whose sum is σ = 221322130023252. Its totient is φ = 221322130023250.

The previous prime is 221322130023179. The next prime is 221322130023271. The reversal of 221322130023251 is 152320031223122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221322130023251 is a prime.

It is not a weakly prime, because it can be changed into another prime (221322130023271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110661065011625 + 110661065011626.

It is an arithmetic number, because the mean of its divisors is an integer number (110661065011626).

Almost surely, 2^{221322130023251} is an apocalyptic number.

221322130023251 is a deficient number, since it is larger than the sum of its proper divisors (1).

221322130023251 is an equidigital number, since it uses as much as digits as its factorization.

221322130023251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 221322130023251 its reverse (152320031223122), we get a palindrome (373642161246373).

The spelling of 221322130023251 in words is "two hundred twenty-one trillion, three hundred twenty-two billion, one hundred thirty million, twenty-three thousand, two hundred fifty-one".