212021322811 has 2 divisors, whose sum is σ = 212021322812. Its totient is φ = 212021322810.

The previous prime is 212021322787. The next prime is 212021322839. The reversal of 212021322811 is 118223120212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021322811 is a prime.

It is not a weakly prime, because it can be changed into another prime (212021302811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010661405 + 106010661406.

It is an arithmetic number, because the mean of its divisors is an integer number (106010661406).

Almost surely, 2^212021322811 is an apocalyptic number.

212021322811 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021322811 is an equidigital number, since it uses as much as digits as its factorization.

212021322811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 212021322811 in words is "two hundred twelve billion, twenty-one million, three hundred twenty-two thousand, eight hundred eleven".