12012222221081 has 2 divisors, whose sum is σ = 12012222221082. Its totient is φ = 12012222221080.

The previous prime is 12012222220919. The next prime is 12012222221113. The reversal of 12012222221081 is 18012222221021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8397337569856 + 3614884651225 = 2897816^2 + 1901285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012222221081 is a prime.

It is a super-2 number, since 2×12012222221081² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12012222221081.

It is not a weakly prime, because it can be changed into another prime (12012222220081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006111110540 + 6006111110541.

It is an arithmetic number, because the mean of its divisors is an integer number (6006111110541).

Almost surely, 2^{12012222221081} is an apocalyptic number.

It is an amenable number.

12012222221081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012222221081 is an equidigital number, since it uses as much as digits as its factorization.

12012222221081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 26.

The spelling of 12012222221081 in words is "twelve trillion, twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, eighty-one".