90221020122151 has 2 divisors, whose sum is σ = 90221020122152. Its totient is φ = 90221020122150.

The previous prime is 90221020122083. The next prime is 90221020122199. The reversal of 90221020122151 is 15122102012209.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90221020122151 - 2³³ = 90212430187559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90221020129151) 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, 45110510061075 + 45110510061076.

It is an arithmetic number, because the mean of its divisors is an integer number (45110510061076).

Almost surely, 2^{90221020122151} is an apocalyptic number.

90221020122151 is a deficient number, since it is larger than the sum of its proper divisors (1).

90221020122151 is an equidigital number, since it uses as much as digits as its factorization.

90221020122151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 90221020122151 in words is "ninety trillion, two hundred twenty-one billion, twenty million, one hundred twenty-two thousand, one hundred fifty-one".