21420241301 has 2 divisors, whose sum is σ = 21420241302. Its totient is φ = 21420241300.

The previous prime is 21420241291. The next prime is 21420241303. The reversal of 21420241301 is 10314202412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20829994276 + 590247025 = 144326^2 + 24295^2 .

It is a cyclic number.

It is not a de Polignac number, because 21420241301 - 2⁶ = 21420241237 is a prime.

It is a Sophie Germain prime.

Together with 21420241303, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21420241303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10710120650 + 10710120651.

It is an arithmetic number, because the mean of its divisors is an integer number (10710120651).

Almost surely, 2^21420241301 is an apocalyptic number.

It is an amenable number.

21420241301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21420241301 is an equidigital number, since it uses as much as digits as its factorization.

21420241301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21420241301 its reverse (10314202412), we get a palindrome (31734443713).

The spelling of 21420241301 in words is "twenty-one billion, four hundred twenty million, two hundred forty-one thousand, three hundred one".