11322020981 has 2 divisors, whose sum is σ = 11322020982. Its totient is φ = 11322020980.

The previous prime is 11322020951. The next prime is 11322021001. The reversal of 11322020981 is 18902022311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8939702500 + 2382318481 = 94550^2 + 48809^2 .

It is a cyclic number.

It is not a de Polignac number, because 11322020981 - 2²⁶ = 11254912117 is a prime.

It is a super-2 number, since 2×11322020981² (a number of 21 digits) contains 22 as substring.

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 (11322020951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5661010490 + 5661010491.

It is an arithmetic number, because the mean of its divisors is an integer number (5661010491).

Almost surely, 2^11322020981 is an apocalyptic number.

It is an amenable number.

11322020981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11322020981 is an equidigital number, since it uses as much as digits as its factorization.

11322020981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 11322020981 in words is "eleven billion, three hundred twenty-two million, twenty thousand, nine hundred eighty-one".