2223128216081 has 2 divisors, whose sum is σ = 2223128216082. Its totient is φ = 2223128216080.

The previous prime is 2223128216077. The next prime is 2223128216093. The reversal of 2223128216081 is 1806128213222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1286715892225 + 936412323856 = 1134335^2 + 967684^2 .

It is a cyclic number.

It is not a de Polignac number, because 2223128216081 - 2² = 2223128216077 is a prime.

It is a super-2 number, since 2×2223128216081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2223128246081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111564108040 + 1111564108041.

It is an arithmetic number, because the mean of its divisors is an integer number (1111564108041).

Almost surely, 2^{2223128216081} is an apocalyptic number.

It is an amenable number.

2223128216081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2223128216081 is an equidigital number, since it uses as much as digits as its factorization.

2223128216081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 2223128216081 in words is "two trillion, two hundred twenty-three billion, one hundred twenty-eight million, two hundred sixteen thousand, eighty-one".