11056353506021 has 2 divisors, whose sum is σ = 11056353506022. Its totient is φ = 11056353506020.

The previous prime is 11056353505949. The next prime is 11056353506123. The reversal of 11056353506021 is 12060535365011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7298129265025 + 3758224240996 = 2701505^2 + 1938614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11056353506021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11056353500021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5528176753010 + 5528176753011.

It is an arithmetic number, because the mean of its divisors is an integer number (5528176753011).

Almost surely, 2^{11056353506021} is an apocalyptic number.

It is an amenable number.

11056353506021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11056353506021 is an equidigital number, since it uses as much as digits as its factorization.

11056353506021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 11056353506021 in words is "eleven trillion, fifty-six billion, three hundred fifty-three million, five hundred six thousand, twenty-one".