210021942913357 has 2 divisors, whose sum is σ = 210021942913358. Its totient is φ = 210021942913356.

The previous prime is 210021942913351. The next prime is 210021942913369. The reversal of 210021942913357 is 753319249120012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110841437071876 + 99180505841481 = 10528126^2 + 9958941^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021942913357 - 2¹¹ = 210021942911309 is a prime.

It is a super-3 number, since 3×210021942913357³ (a number of 44 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210021942913357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210021942913351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010971456678 + 105010971456679.

It is an arithmetic number, because the mean of its divisors is an integer number (105010971456679).

Almost surely, 2^{210021942913357} is an apocalyptic number.

It is an amenable number.

210021942913357 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021942913357 is an equidigital number, since it uses as much as digits as its factorization.

210021942913357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 210021942913357 in words is "two hundred ten trillion, twenty-one billion, nine hundred forty-two million, nine hundred thirteen thousand, three hundred fifty-seven".