211320203473 has 2 divisors, whose sum is σ = 211320203474. Its totient is φ = 211320203472.

The previous prime is 211320203441. The next prime is 211320203489. The reversal of 211320203473 is 374302023112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206749361809 + 4570841664 = 454697^2 + 67608^2 .

It is a cyclic number.

It is not a de Polignac number, because 211320203473 - 2⁵ = 211320203441 is a prime.

It is not a weakly prime, because it can be changed into another prime (211320203273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105660101736 + 105660101737.

It is an arithmetic number, because the mean of its divisors is an integer number (105660101737).

Almost surely, 2^211320203473 is an apocalyptic number.

It is an amenable number.

211320203473 is a deficient number, since it is larger than the sum of its proper divisors (1).

211320203473 is an equidigital number, since it uses as much as digits as its factorization.

211320203473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 28.

Adding to 211320203473 its reverse (374302023112), we get a palindrome (585622226585).

The spelling of 211320203473 in words is "two hundred eleven billion, three hundred twenty million, two hundred three thousand, four hundred seventy-three".