212021813033 has 2 divisors, whose sum is σ = 212021813034. Its totient is φ = 212021813032.

The previous prime is 212021813023. The next prime is 212021813057. The reversal of 212021813033 is 330318120212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184029846169 + 27991966864 = 428987^2 + 167308^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021813033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212021812993 and 212021813011.

It is not a weakly prime, because it can be changed into another prime (212021813023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010906516 + 106010906517.

It is an arithmetic number, because the mean of its divisors is an integer number (106010906517).

Almost surely, 2^212021813033 is an apocalyptic number.

It is an amenable number.

212021813033 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021813033 is an equidigital number, since it uses as much as digits as its factorization.

212021813033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 212021813033 its reverse (330318120212), we get a palindrome (542339933245).

The spelling of 212021813033 in words is "two hundred twelve billion, twenty-one million, eight hundred thirteen thousand, thirty-three".