210221079105293 has 2 divisors, whose sum is σ = 210221079105294. Its totient is φ = 210221079105292.

The previous prime is 210221079105227. The next prime is 210221079105337. The reversal of 210221079105293 is 392501970122012.

It is an a-pointer prime, because the next prime (210221079105337) can be obtained adding 210221079105293 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183005106531844 + 27215972573449 = 13527938^2 + 5216893^2 .

It is a cyclic number.

It is not a de Polignac number, because 210221079105293 - 2¹⁶ = 210221079039757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210221079105203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110539552646 + 105110539552647.

It is an arithmetic number, because the mean of its divisors is an integer number (105110539552647).

Almost surely, 2^{210221079105293} is an apocalyptic number.

It is an amenable number.

210221079105293 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221079105293 is an equidigital number, since it uses as much as digits as its factorization.

210221079105293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 210221079105293 in words is "two hundred ten trillion, two hundred twenty-one billion, seventy-nine million, one hundred five thousand, two hundred ninety-three".