21211131343 has 2 divisors, whose sum is σ = 21211131344. Its totient is φ = 21211131342.

The previous prime is 21211131311. The next prime is 21211131371. The reversal of 21211131343 is 34313111212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21211131343 - 2⁵ = 21211131311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211131943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605565671 + 10605565672.

It is an arithmetic number, because the mean of its divisors is an integer number (10605565672).

Almost surely, 2^21211131343 is an apocalyptic number.

21211131343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211131343 is an equidigital number, since it uses as much as digits as its factorization.

21211131343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

Adding to 21211131343 its reverse (34313111212), we get a palindrome (55524242555).

The spelling of 21211131343 in words is "twenty-one billion, two hundred eleven million, one hundred thirty-one thousand, three hundred forty-three".