426546461221 has 2 divisors, whose sum is σ = 426546461222. Its totient is φ = 426546461220.

The previous prime is 426546461167. The next prime is 426546461233. The reversal of 426546461221 is 122164645624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312133398721 + 114413062500 = 558689^2 + 338250^2 .

It is a cyclic number.

It is not a de Polignac number, because 426546461221 - 2¹⁵ = 426546428453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426546461251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213273230610 + 213273230611.

It is an arithmetic number, because the mean of its divisors is an integer number (213273230611).

Almost surely, 2^426546461221 is an apocalyptic number.

It is an amenable number.

426546461221 is a deficient number, since it is larger than the sum of its proper divisors (1).

426546461221 is an equidigital number, since it uses as much as digits as its factorization.

426546461221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 552960, while the sum is 43.

The spelling of 426546461221 in words is "four hundred twenty-six billion, five hundred forty-six million, four hundred sixty-one thousand, two hundred twenty-one".