21310300441 has 2 divisors, whose sum is σ = 21310300442. Its totient is φ = 21310300440.

The previous prime is 21310300433. The next prime is 21310300537. The reversal of 21310300441 is 14400301312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21033410841 + 276889600 = 145029^2 + 16640^2 .

It is a cyclic number.

It is not a de Polignac number, because 21310300441 - 2³ = 21310300433 is a prime.

It is not a weakly prime, because it can be changed into another prime (21310300541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655150220 + 10655150221.

It is an arithmetic number, because the mean of its divisors is an integer number (10655150221).

Almost surely, 2^21310300441 is an apocalyptic number.

It is an amenable number.

21310300441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310300441 is an equidigital number, since it uses as much as digits as its factorization.

21310300441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21310300441 its reverse (14400301312), we get a palindrome (35710601753).

The spelling of 21310300441 in words is "twenty-one billion, three hundred ten million, three hundred thousand, four hundred forty-one".