1224013121081 has 2 divisors, whose sum is σ = 1224013121082. Its totient is φ = 1224013121080.

The previous prime is 1224013121003. The next prime is 1224013121137. The reversal of 1224013121081 is 1801213104221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1209815207056 + 14197914025 = 1099916^2 + 119155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224013121081 is a prime.

It is a super-2 number, since 2×1224013121081² (a number of 25 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 1224013121081.

It is not a weakly prime, because it can be changed into another prime (1224013121281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612006560540 + 612006560541.

It is an arithmetic number, because the mean of its divisors is an integer number (612006560541).

Almost surely, 2^{1224013121081} is an apocalyptic number.

It is an amenable number.

1224013121081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224013121081 is an equidigital number, since it uses as much as digits as its factorization.

1224013121081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 26.

The spelling of 1224013121081 in words is "one trillion, two hundred twenty-four billion, thirteen million, one hundred twenty-one thousand, eighty-one".