210021111343 has 2 divisors, whose sum is σ = 210021111344. Its totient is φ = 210021111342.

The previous prime is 210021111317. The next prime is 210021111359. The reversal of 210021111343 is 343111120012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210021111343 - 2¹³ = 210021103151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210021111343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210021111373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010555671 + 105010555672.

It is an arithmetic number, because the mean of its divisors is an integer number (105010555672).

Almost surely, 2^210021111343 is an apocalyptic number.

210021111343 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021111343 is an equidigital number, since it uses as much as digits as its factorization.

210021111343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 210021111343 its reverse (343111120012), we get a palindrome (553132231355).

The spelling of 210021111343 in words is "two hundred ten billion, twenty-one million, one hundred eleven thousand, three hundred forty-three".