211223203133 has 2 divisors, whose sum is σ = 211223203134. Its totient is φ = 211223203132.

The previous prime is 211223203099. The next prime is 211223203181. The reversal of 211223203133 is 331302322112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201100227364 + 10122975769 = 448442^2 + 100613^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211223203133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211223203099 and 211223203108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211223203333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611601566 + 105611601567.

It is an arithmetic number, because the mean of its divisors is an integer number (105611601567).

Almost surely, 2^211223203133 is an apocalyptic number.

It is an amenable number.

211223203133 is a deficient number, since it is larger than the sum of its proper divisors (1).

211223203133 is an equidigital number, since it uses as much as digits as its factorization.

211223203133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 211223203133 its reverse (331302322112), we get a palindrome (542525525245).

The spelling of 211223203133 in words is "two hundred eleven billion, two hundred twenty-three million, two hundred three thousand, one hundred thirty-three".