1221010220063 has 2 divisors, whose sum is σ = 1221010220064. Its totient is φ = 1221010220062.

The previous prime is 1221010219921. The next prime is 1221010220069. The reversal of 1221010220063 is 3600220101221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221010220063 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221010220069) 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, 610505110031 + 610505110032.

It is an arithmetic number, because the mean of its divisors is an integer number (610505110032).

Almost surely, 2^{1221010220063} is an apocalyptic number.

1221010220063 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221010220063 is an equidigital number, since it uses as much as digits as its factorization.

1221010220063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1221010220063 its reverse (3600220101221), we get a palindrome (4821230321284).

The spelling of 1221010220063 in words is "one trillion, two hundred twenty-one billion, ten million, two hundred twenty thousand, sixty-three".