11212013081 has 2 divisors, whose sum is σ = 11212013082. Its totient is φ = 11212013080.

The previous prime is 11212013047. The next prime is 11212013149. The reversal of 11212013081 is 18031021211.

It is a happy number.

11212013081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9864462400 + 1347550681 = 99320^2 + 36709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212013081 is a prime.

It is a super-2 number, since 2×11212013081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11212013581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606006540 + 5606006541.

It is an arithmetic number, because the mean of its divisors is an integer number (5606006541).

Almost surely, 2^11212013081 is an apocalyptic number.

It is an amenable number.

11212013081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212013081 is an equidigital number, since it uses as much as digits as its factorization.

11212013081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 11212013081 its reverse (18031021211), we get a palindrome (29243034292).

The spelling of 11212013081 in words is "eleven billion, two hundred twelve million, thirteen thousand, eighty-one".