221221424040151 has 2 divisors, whose sum is σ = 221221424040152. Its totient is φ = 221221424040150.

The previous prime is 221221424040079. The next prime is 221221424040191. The reversal of 221221424040151 is 151040424122122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221221424040151 - 2¹¹ = 221221424038103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221221424040191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610712020075 + 110610712020076.

It is an arithmetic number, because the mean of its divisors is an integer number (110610712020076).

Almost surely, 2^{221221424040151} is an apocalyptic number.

221221424040151 is a deficient number, since it is larger than the sum of its proper divisors (1).

221221424040151 is an equidigital number, since it uses as much as digits as its factorization.

221221424040151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10240, while the sum is 31.

Adding to 221221424040151 its reverse (151040424122122), we get a palindrome (372261848162273).

The spelling of 221221424040151 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, four hundred twenty-four million, forty thousand, one hundred fifty-one".