12221220112081 has 2 divisors, whose sum is σ = 12221220112082. Its totient is φ = 12221220112080.

The previous prime is 12221220112063. The next prime is 12221220112091. The reversal of 12221220112081 is 18021102212221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12194350345681 + 26869766400 = 3492041^2 + 163920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221220112081 is a prime.

It is a super-2 number, since 2×12221220112081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12221220112091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110610056040 + 6110610056041.

It is an arithmetic number, because the mean of its divisors is an integer number (6110610056041).

Almost surely, 2^{12221220112081} is an apocalyptic number.

It is an amenable number.

12221220112081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221220112081 is an equidigital number, since it uses as much as digits as its factorization.

12221220112081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 25.

The spelling of 12221220112081 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, eighty-one".