21143133241 has 2 divisors, whose sum is σ = 21143133242. Its totient is φ = 21143133240.

The previous prime is 21143133233. The next prime is 21143133247. The reversal of 21143133241 is 14233134112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21110927616 + 32205625 = 145296^2 + 5675^2 .

It is a cyclic number.

It is not a de Polignac number, because 21143133241 - 2³ = 21143133233 is a prime.

It is not a weakly prime, because it can be changed into another prime (21143133247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571566620 + 10571566621.

It is an arithmetic number, because the mean of its divisors is an integer number (10571566621).

Almost surely, 2^21143133241 is an apocalyptic number.

It is an amenable number.

21143133241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21143133241 is an equidigital number, since it uses as much as digits as its factorization.

21143133241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

Adding to 21143133241 its reverse (14233134112), we get a palindrome (35376267353).

The spelling of 21143133241 in words is "twenty-one billion, one hundred forty-three million, one hundred thirty-three thousand, two hundred forty-one".