211311003961 has 2 divisors, whose sum is σ = 211311003962. Its totient is φ = 211311003960.

The previous prime is 211311003941. The next prime is 211311003979. The reversal of 211311003961 is 169300113112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210061805625 + 1249198336 = 458325^2 + 35344^2 .

It is a cyclic number.

It is not a de Polignac number, because 211311003961 - 2³⁵ = 176951265593 is a prime.

It is not a weakly prime, because it can be changed into another prime (211311003941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105655501980 + 105655501981.

It is an arithmetic number, because the mean of its divisors is an integer number (105655501981).

Almost surely, 2^211311003961 is an apocalyptic number.

It is an amenable number.

211311003961 is a deficient number, since it is larger than the sum of its proper divisors (1).

211311003961 is an equidigital number, since it uses as much as digits as its factorization.

211311003961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

The spelling of 211311003961 in words is "two hundred eleven billion, three hundred eleven million, three thousand, nine hundred sixty-one".