211000220019973 has 2 divisors, whose sum is σ = 211000220019974. Its totient is φ = 211000220019972.

The previous prime is 211000220019943. The next prime is 211000220019977. The reversal of 211000220019973 is 379910022000112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173884125099169 + 37116094920804 = 13186513^2 + 6092298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211000220019973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211000220019977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105500110009986 + 105500110009987.

It is an arithmetic number, because the mean of its divisors is an integer number (105500110009987).

Almost surely, 2^{211000220019973} is an apocalyptic number.

It is an amenable number.

211000220019973 is a deficient number, since it is larger than the sum of its proper divisors (1).

211000220019973 is an equidigital number, since it uses as much as digits as its factorization.

211000220019973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 211000220019973 in words is "two hundred eleven trillion, two hundred twenty million, nineteen thousand, nine hundred seventy-three".