1220618510963 has 2 divisors, whose sum is σ = 1220618510964. Its totient is φ = 1220618510962.

The previous prime is 1220618510869. The next prime is 1220618510981. The reversal of 1220618510963 is 3690158160221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220618510963 - 2¹⁶ = 1220618445427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220618510663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610309255481 + 610309255482.

It is an arithmetic number, because the mean of its divisors is an integer number (610309255482).

Almost surely, 2^{1220618510963} is an apocalyptic number.

1220618510963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220618510963 is an equidigital number, since it uses as much as digits as its factorization.

1220618510963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 1220618510963 in words is "one trillion, two hundred twenty billion, six hundred eighteen million, five hundred ten thousand, nine hundred sixty-three".