12000221221081 has 2 divisors, whose sum is σ = 12000221221082. Its totient is φ = 12000221221080.

The previous prime is 12000221220991. The next prime is 12000221221091. The reversal of 12000221221081 is 18012212200021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8205595140681 + 3794626080400 = 2864541^2 + 1947980^2 .

It is a cyclic number.

It is not a de Polignac number, because 12000221221081 - 2¹⁷ = 12000221090009 is a prime.

It is a super-2 number, since 2×12000221221081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12000221221091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000110610540 + 6000110610541.

It is an arithmetic number, because the mean of its divisors is an integer number (6000110610541).

Almost surely, 2^{12000221221081} is an apocalyptic number.

It is an amenable number.

12000221221081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12000221221081 is an equidigital number, since it uses as much as digits as its factorization.

12000221221081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

The spelling of 12000221221081 in words is "twelve trillion, two hundred twenty-one million, two hundred twenty-one thousand, eighty-one".