211210221109973 has 2 divisors, whose sum is σ = 211210221109974. Its totient is φ = 211210221109972.

The previous prime is 211210221109969. The next prime is 211210221109999. The reversal of 211210221109973 is 379901122012112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140486544700804 + 70723676409169 = 11852702^2 + 8409737^2 .

It is a cyclic number.

It is not a de Polignac number, because 211210221109973 - 2² = 211210221109969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211210221109973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211210221109913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605110554986 + 105605110554987.

It is an arithmetic number, because the mean of its divisors is an integer number (105605110554987).

Almost surely, 2^{211210221109973} is an apocalyptic number.

It is an amenable number.

211210221109973 is a deficient number, since it is larger than the sum of its proper divisors (1).

211210221109973 is an equidigital number, since it uses as much as digits as its factorization.

211210221109973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The spelling of 211210221109973 in words is "two hundred eleven trillion, two hundred ten billion, two hundred twenty-one million, one hundred nine thousand, nine hundred seventy-three".