11100112131281 has 2 divisors, whose sum is σ = 11100112131282. Its totient is φ = 11100112131280.

The previous prime is 11100112131247. The next prime is 11100112131343. The reversal of 11100112131281 is 18213121100111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7324552244881 + 3775559886400 = 2706391^2 + 1943080^2 .

It is a cyclic number.

It is not a de Polignac number, because 11100112131281 - 2³⁴ = 11082932262097 is a prime.

It is a super-2 number, since 2×11100112131281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11100112431281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550056065640 + 5550056065641.

It is an arithmetic number, because the mean of its divisors is an integer number (5550056065641).

Almost surely, 2^{11100112131281} is an apocalyptic number.

It is an amenable number.

11100112131281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100112131281 is an equidigital number, since it uses as much as digits as its factorization.

11100112131281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 23.

Adding to 11100112131281 its reverse (18213121100111), we get a palindrome (29313233231392).

The spelling of 11100112131281 in words is "eleven trillion, one hundred billion, one hundred twelve million, one hundred thirty-one thousand, two hundred eighty-one".