11212211032081 has 2 divisors, whose sum is σ = 11212211032082. Its totient is φ = 11212211032080.

The previous prime is 11212211032063. The next prime is 11212211032129. The reversal of 11212211032081 is 18023011221211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9063465492481 + 2148745539600 = 3010559^2 + 1465860^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212211032081 - 2⁵ = 11212211032049 is a prime.

It is a super-2 number, since 2×11212211032081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11212211032481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606105516040 + 5606105516041.

It is an arithmetic number, because the mean of its divisors is an integer number (5606105516041).

Almost surely, 2^{11212211032081} is an apocalyptic number.

It is an amenable number.

11212211032081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212211032081 is an equidigital number, since it uses as much as digits as its factorization.

11212211032081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 25.

Adding to 11212211032081 its reverse (18023011221211), we get a palindrome (29235222253292).

The spelling of 11212211032081 in words is "eleven trillion, two hundred twelve billion, two hundred eleven million, thirty-two thousand, eighty-one".