421122321757 has 2 divisors, whose sum is σ = 421122321758. Its totient is φ = 421122321756.

The previous prime is 421122321691. The next prime is 421122321791. The reversal of 421122321757 is 757123221124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 367610603481 + 53511718276 = 606309^2 + 231326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421122321757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421122322757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210561160878 + 210561160879.

It is an arithmetic number, because the mean of its divisors is an integer number (210561160879).

Almost surely, 2^421122321757 is an apocalyptic number.

It is an amenable number.

421122321757 is a deficient number, since it is larger than the sum of its proper divisors (1).

421122321757 is an equidigital number, since it uses as much as digits as its factorization.

421122321757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 37.

The spelling of 421122321757 in words is "four hundred twenty-one billion, one hundred twenty-two million, three hundred twenty-one thousand, seven hundred fifty-seven".