210201210221993 has 2 divisors, whose sum is σ = 210201210221994. Its totient is φ = 210201210221992.

The previous prime is 210201210221957. The next prime is 210201210222007. The reversal of 210201210221993 is 399122012102012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182871610138009 + 27329600083984 = 13523003^2 + 5227772^2 .

It is a cyclic number.

It is not a de Polignac number, because 210201210221993 - 2³⁴ = 210184030352809 is a prime.

It is a super-3 number, since 3×210201210221993³ (a number of 44 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (210201210221953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105100605110996 + 105100605110997.

It is an arithmetic number, because the mean of its divisors is an integer number (105100605110997).

Almost surely, 2^{210201210221993} is an apocalyptic number.

It is an amenable number.

210201210221993 is a deficient number, since it is larger than the sum of its proper divisors (1).

210201210221993 is an equidigital number, since it uses as much as digits as its factorization.

210201210221993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 210201210221993 in words is "two hundred ten trillion, two hundred one billion, two hundred ten million, two hundred twenty-one thousand, nine hundred ninety-three".