212021201213 has 2 divisors, whose sum is σ = 212021201214. Its totient is φ = 212021201212.

The previous prime is 212021201201. The next prime is 212021201257. The reversal of 212021201213 is 312102120212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186453830809 + 25567370404 = 431803^2 + 159898^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021201213 - 2¹⁰ = 212021200189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212021201191 and 212021201200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212021201263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010600606 + 106010600607.

It is an arithmetic number, because the mean of its divisors is an integer number (106010600607).

Almost surely, 2^212021201213 is an apocalyptic number.

It is an amenable number.

212021201213 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021201213 is an equidigital number, since it uses as much as digits as its factorization.

212021201213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212021201213 its reverse (312102120212), we get a palindrome (524123321425).

The spelling of 212021201213 in words is "two hundred twelve billion, twenty-one million, two hundred one thousand, two hundred thirteen".