21200340001441 has 2 divisors, whose sum is σ = 21200340001442. Its totient is φ = 21200340001440.

The previous prime is 21200340001439. The next prime is 21200340001447. The reversal of 21200340001441 is 14410004300212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15644556302400 + 5555783699041 = 3955320^2 + 2357071^2 .

It is a cyclic number.

It is not a de Polignac number, because 21200340001441 - 2¹ = 21200340001439 is a prime.

Together with 21200340001439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21200340001447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600170000720 + 10600170000721.

It is an arithmetic number, because the mean of its divisors is an integer number (10600170000721).

Almost surely, 2^{21200340001441} is an apocalyptic number.

It is an amenable number.

21200340001441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200340001441 is an equidigital number, since it uses as much as digits as its factorization.

21200340001441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21200340001441 its reverse (14410004300212), we get a palindrome (35610344301653).

The spelling of 21200340001441 in words is "twenty-one trillion, two hundred billion, three hundred forty million, one thousand, four hundred forty-one".