11200205981 has 2 divisors, whose sum is σ = 11200205982. Its totient is φ = 11200205980.

The previous prime is 11200205959. The next prime is 11200206023. The reversal of 11200205981 is 18950200211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6281989081 + 4918216900 = 79259^2 + 70130^2 .

It is a cyclic number.

It is not a de Polignac number, because 11200205981 - 2⁶ = 11200205917 is a prime.

It is a super-2 number, since 2×11200205981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11200205921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600102990 + 5600102991.

It is an arithmetic number, because the mean of its divisors is an integer number (5600102991).

Almost surely, 2^11200205981 is an apocalyptic number.

It is an amenable number.

11200205981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11200205981 is an equidigital number, since it uses as much as digits as its factorization.

11200205981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The spelling of 11200205981 in words is "eleven billion, two hundred million, two hundred five thousand, nine hundred eighty-one".