212021111220011 has 2 divisors, whose sum is σ = 212021111220012. Its totient is φ = 212021111220010.

The previous prime is 212021111219987. The next prime is 212021111220013. The reversal of 212021111220011 is 110022111120212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021111220011 is a prime.

Together with 212021111220013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212021111220013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010555610005 + 106010555610006.

It is an arithmetic number, because the mean of its divisors is an integer number (106010555610006).

Almost surely, 2^{212021111220011} is an apocalyptic number.

212021111220011 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021111220011 is an equidigital number, since it uses as much as digits as its factorization.

212021111220011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212021111220011 its reverse (110022111120212), we get a palindrome (322043222340223).

The spelling of 212021111220011 in words is "two hundred twelve trillion, twenty-one billion, one hundred eleven million, two hundred twenty thousand, eleven".