12221032081 has 2 divisors, whose sum is σ = 12221032082. Its totient is φ = 12221032080.

The previous prime is 12221032003. The next prime is 12221032099. The reversal of 12221032081 is 18023012221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12003174481 + 217857600 = 109559^2 + 14760^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221032081 - 2¹⁵ = 12220999313 is a prime.

It is a super-2 number, since 2×12221032081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12221032181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110516040 + 6110516041.

It is an arithmetic number, because the mean of its divisors is an integer number (6110516041).

Almost surely, 2^12221032081 is an apocalyptic number.

It is an amenable number.

12221032081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221032081 is an equidigital number, since it uses as much as digits as its factorization.

12221032081 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 22.

The spelling of 12221032081 in words is "twelve billion, two hundred twenty-one million, thirty-two thousand, eighty-one".