11221011112081 has 2 divisors, whose sum is σ = 11221011112082. Its totient is φ = 11221011112080.

The previous prime is 11221011112079. The next prime is 11221011112139. The reversal of 11221011112081 is 18021111012211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8532001479681 + 2689009632400 = 2920959^2 + 1639820^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221011112081 - 2¹ = 11221011112079 is a prime.

It is a super-2 number, since 2×11221011112081² (a number of 27 digits) contains 22 as substring.

Together with 11221011112079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11221011152081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610505556040 + 5610505556041.

It is an arithmetic number, because the mean of its divisors is an integer number (5610505556041).

Almost surely, 2^{11221011112081} is an apocalyptic number.

It is an amenable number.

11221011112081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221011112081 is an equidigital number, since it uses as much as digits as its factorization.

11221011112081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 22.

Adding to 11221011112081 its reverse (18021111012211), we get a palindrome (29242122124292).

The spelling of 11221011112081 in words is "eleven trillion, two hundred twenty-one billion, eleven million, one hundred twelve thousand, eighty-one".