2281220189081 has 2 divisors, whose sum is σ = 2281220189082. Its totient is φ = 2281220189080.

The previous prime is 2281220189071. The next prime is 2281220189093. The reversal of 2281220189081 is 1809810221822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2073430083481 + 207790105600 = 1439941^2 + 455840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2281220189081 is a prime.

It is a super-2 number, since 2×2281220189081² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2281220189021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1140610094540 + 1140610094541.

It is an arithmetic number, because the mean of its divisors is an integer number (1140610094541).

Almost surely, 2^{2281220189081} is an apocalyptic number.

It is an amenable number.

2281220189081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2281220189081 is an equidigital number, since it uses as much as digits as its factorization.

2281220189081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 44.

The spelling of 2281220189081 in words is "two trillion, two hundred eighty-one billion, two hundred twenty million, one hundred eighty-nine thousand, eighty-one".