212021111220013 has 2 divisors, whose sum is σ = 212021111220014. Its totient is φ = 212021111220012.

The previous prime is 212021111220011. The next prime is 212021111220181. The reversal of 212021111220013 is 310022111120212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170548502974084 + 41472608245929 = 13059422^2 + 6439923^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021111220013 - 2¹ = 212021111220011 is a prime.

Together with 212021111220011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212021111220011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010555610006 + 106010555610007.

It is an arithmetic number, because the mean of its divisors is an integer number (106010555610007).

Almost surely, 2^{212021111220013} is an apocalyptic number.

It is an amenable number.

212021111220013 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021111220013 is an equidigital number, since it uses as much as digits as its factorization.

212021111220013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 212021111220013 its reverse (310022111120212), we get a palindrome (522043222340225).

The spelling of 212021111220013 in words is "two hundred twelve trillion, twenty-one billion, one hundred eleven million, two hundred twenty thousand, thirteen".