20210210221973 has 2 divisors, whose sum is σ = 20210210221974. Its totient is φ = 20210210221972.

The previous prime is 20210210221843. The next prime is 20210210222101. The reversal of 20210210221973 is 37912201201202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16290732847684 + 3919477374289 = 4036178^2 + 1979767^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210210221973 - 2¹⁴ = 20210210205589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210210221673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105105110986 + 10105105110987.

It is an arithmetic number, because the mean of its divisors is an integer number (10105105110987).

Almost surely, 2^{20210210221973} is an apocalyptic number.

It is an amenable number.

20210210221973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210210221973 is an equidigital number, since it uses as much as digits as its factorization.

20210210221973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 20210210221973 in words is "twenty trillion, two hundred ten billion, two hundred ten million, two hundred twenty-one thousand, nine hundred seventy-three".