1012224011581 has 2 divisors, whose sum is σ = 1012224011582. Its totient is φ = 1012224011580.

The previous prime is 1012224011507. The next prime is 1012224011609. The reversal of 1012224011581 is 1851104222101.

It is an a-pointer prime, because the next prime (1012224011609) can be obtained adding 1012224011581 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 869686804900 + 142537206681 = 932570^2 + 377541^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012224011581 - 2¹⁷ = 1012223880509 is a prime.

It is a super-2 number, since 2×1012224011581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012224011501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506112005790 + 506112005791.

It is an arithmetic number, because the mean of its divisors is an integer number (506112005791).

Almost surely, 2^{1012224011581} is an apocalyptic number.

It is an amenable number.

1012224011581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012224011581 is an equidigital number, since it uses as much as digits as its factorization.

1012224011581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 28.

Adding to 1012224011581 its reverse (1851104222101), we get a palindrome (2863328233682).

The spelling of 1012224011581 in words is "one trillion, twelve billion, two hundred twenty-four million, eleven thousand, five hundred eighty-one".