42421021001 has 2 divisors, whose sum is σ = 42421021002. Its totient is φ = 42421021000.

The previous prime is 42421020973. The next prime is 42421021003. The reversal of 42421021001 is 10012012424.

42421021001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40956045376 + 1464975625 = 202376^2 + 38275^2 .

It is a cyclic number.

It is not a de Polignac number, because 42421021001 - 2³⁰ = 41347279177 is a prime.

Together with 42421021003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42421021003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21210510500 + 21210510501.

It is an arithmetic number, because the mean of its divisors is an integer number (21210510501).

Almost surely, 2^42421021001 is an apocalyptic number.

It is an amenable number.

42421021001 is a deficient number, since it is larger than the sum of its proper divisors (1).

42421021001 is an equidigital number, since it uses as much as digits as its factorization.

42421021001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 42421021001 its reverse (10012012424), we get a palindrome (52433033425).

The spelling of 42421021001 in words is "forty-two billion, four hundred twenty-one million, twenty-one thousand, one".