21424020042301 has 2 divisors, whose sum is σ = 21424020042302. Its totient is φ = 21424020042300.

The previous prime is 21424020042193. The next prime is 21424020042319. The reversal of 21424020042301 is 10324002042412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14884364616676 + 6539655425625 = 3858026^2 + 2557275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21424020042301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21424020052301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10712010021150 + 10712010021151.

It is an arithmetic number, because the mean of its divisors is an integer number (10712010021151).

Almost surely, 2^{21424020042301} is an apocalyptic number.

It is an amenable number.

21424020042301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21424020042301 is an equidigital number, since it uses as much as digits as its factorization.

21424020042301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21424020042301 its reverse (10324002042412), we get a palindrome (31748022084713).

The spelling of 21424020042301 in words is "twenty-one trillion, four hundred twenty-four billion, twenty million, forty-two thousand, three hundred one".