7450638512221 has 2 divisors, whose sum is σ = 7450638512222. Its totient is φ = 7450638512220.

The previous prime is 7450638512147. The next prime is 7450638512227. The reversal of 7450638512221 is 1222158360547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7439179880196 + 11458632025 = 2727486^2 + 107045^2 .

It is a cyclic number.

It is not a de Polignac number, because 7450638512221 - 2²¹ = 7450636415069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7450638512227) 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, 3725319256110 + 3725319256111.

It is an arithmetic number, because the mean of its divisors is an integer number (3725319256111).

Almost surely, 2^{7450638512221} is an apocalyptic number.

It is an amenable number.

7450638512221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7450638512221 is an equidigital number, since it uses as much as digits as its factorization.

7450638512221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 7450638512221 in words is "seven trillion, four hundred fifty billion, six hundred thirty-eight million, five hundred twelve thousand, two hundred twenty-one".