210021000209743 has 2 divisors, whose sum is σ = 210021000209744. Its totient is φ = 210021000209742.

The previous prime is 210021000209731. The next prime is 210021000209789. The reversal of 210021000209743 is 347902000120012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210021000209743 - 2⁵ = 210021000209711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210021000201743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010500104871 + 105010500104872.

It is an arithmetic number, because the mean of its divisors is an integer number (105010500104872).

Almost surely, 2^{210021000209743} is an apocalyptic number.

210021000209743 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021000209743 is an equidigital number, since it uses as much as digits as its factorization.

210021000209743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

Adding to 210021000209743 its reverse (347902000120012), we get a palindrome (557923000329755).

The spelling of 210021000209743 in words is "two hundred ten trillion, twenty-one billion, two hundred nine thousand, seven hundred forty-three".