1223444400511 has 2 divisors, whose sum is σ = 1223444400512. Its totient is φ = 1223444400510.

The previous prime is 1223444400397. The next prime is 1223444400557. The reversal of 1223444400511 is 1150044443221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223444400511 is a prime.

It is a super-2 number, since 2×1223444400511² (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 (1223444401511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611722200255 + 611722200256.

It is an arithmetic number, because the mean of its divisors is an integer number (611722200256).

Almost surely, 2^{1223444400511} is an apocalyptic number.

1223444400511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223444400511 is an equidigital number, since it uses as much as digits as its factorization.

1223444400511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 1223444400511 its reverse (1150044443221), we get a palindrome (2373488843732).

The spelling of 1223444400511 in words is "one trillion, two hundred twenty-three billion, four hundred forty-four million, four hundred thousand, five hundred eleven".