1221140699563 has 2 divisors, whose sum is σ = 1221140699564. Its totient is φ = 1221140699562.

The previous prime is 1221140699551. The next prime is 1221140699591. The reversal of 1221140699563 is 3659960411221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221140699563 - 2¹³ = 1221140691371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221140699063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610570349781 + 610570349782.

It is an arithmetic number, because the mean of its divisors is an integer number (610570349782).

Almost surely, 2^{1221140699563} is an apocalyptic number.

1221140699563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221140699563 is an equidigital number, since it uses as much as digits as its factorization.

1221140699563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 1221140699563 in words is "one trillion, two hundred twenty-one billion, one hundred forty million, six hundred ninety-nine thousand, five hundred sixty-three".