11100130121981 has 2 divisors, whose sum is σ = 11100130121982. Its totient is φ = 11100130121980.

The previous prime is 11100130121911. The next prime is 11100130122049. The reversal of 11100130121981 is 18912103100111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9306831504100 + 1793298617881 = 3050710^2 + 1339141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11100130121981 is a prime.

It is a super-2 number, since 2×11100130121981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11100130121911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550065060990 + 5550065060991.

It is an arithmetic number, because the mean of its divisors is an integer number (5550065060991).

Almost surely, 2^{11100130121981} is an apocalyptic number.

It is an amenable number.

11100130121981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100130121981 is an equidigital number, since it uses as much as digits as its factorization.

11100130121981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 29.

The spelling of 11100130121981 in words is "eleven trillion, one hundred billion, one hundred thirty million, one hundred twenty-one thousand, nine hundred eighty-one".