21344131201 has 2 divisors, whose sum is σ = 21344131202. Its totient is φ = 21344131200.

The previous prime is 21344131141. The next prime is 21344131273. The reversal of 21344131201 is 10213144312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20256120976 + 1088010225 = 142324^2 + 32985^2 .

It is a cyclic number.

It is not a de Polignac number, because 21344131201 - 2⁷ = 21344131073 is a prime.

It is not a weakly prime, because it can be changed into another prime (21344131301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672065600 + 10672065601.

It is an arithmetic number, because the mean of its divisors is an integer number (10672065601).

Almost surely, 2^21344131201 is an apocalyptic number.

It is an amenable number.

21344131201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344131201 is an equidigital number, since it uses as much as digits as its factorization.

21344131201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21344131201 its reverse (10213144312), we get a palindrome (31557275513).

The spelling of 21344131201 in words is "twenty-one billion, three hundred forty-four million, one hundred thirty-one thousand, two hundred one".