32421505421 has 2 divisors, whose sum is σ = 32421505422. Its totient is φ = 32421505420.

The previous prime is 32421505393. The next prime is 32421505423. The reversal of 32421505421 is 12450512423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30383976100 + 2037529321 = 174310^2 + 45139^2 .

It is a cyclic number.

It is not a de Polignac number, because 32421505421 - 2¹⁸ = 32421243277 is a prime.

Together with 32421505423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32421505423) 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, 16210752710 + 16210752711.

It is an arithmetic number, because the mean of its divisors is an integer number (16210752711).

Almost surely, 2^32421505421 is an apocalyptic number.

It is an amenable number.

32421505421 is a deficient number, since it is larger than the sum of its proper divisors (1).

32421505421 is an equidigital number, since it uses as much as digits as its factorization.

32421505421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 32421505421 in words is "thirty-two billion, four hundred twenty-one million, five hundred five thousand, four hundred twenty-one".