1224001540561 has 2 divisors, whose sum is σ = 1224001540562. Its totient is φ = 1224001540560.

The previous prime is 1224001540537. The next prime is 1224001540571. The reversal of 1224001540561 is 1650451004221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1074603830161 + 149397710400 = 1036631^2 + 386520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224001540561 - 2¹⁷ = 1224001409489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1224001540571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612000770280 + 612000770281.

It is an arithmetic number, because the mean of its divisors is an integer number (612000770281).

Almost surely, 2^{1224001540561} is an apocalyptic number.

It is an amenable number.

1224001540561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224001540561 is an equidigital number, since it uses as much as digits as its factorization.

1224001540561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 1224001540561 its reverse (1650451004221), we get a palindrome (2874452544782).

The spelling of 1224001540561 in words is "one trillion, two hundred twenty-four billion, one million, five hundred forty thousand, five hundred sixty-one".