1220013220121 has 2 divisors, whose sum is σ = 1220013220122. Its totient is φ = 1220013220120.

The previous prime is 1220013220117. The next prime is 1220013220171. The reversal of 1220013220121 is 1210223100221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 885836733721 + 334176486400 = 941189^2 + 578080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220013220121 - 2² = 1220013220117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220013220121.

It is not a weakly prime, because it can be changed into another prime (1220013220171) 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, 610006610060 + 610006610061.

It is an arithmetic number, because the mean of its divisors is an integer number (610006610061).

Almost surely, 2^{1220013220121} is an apocalyptic number.

It is an amenable number.

1220013220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220013220121 is an equidigital number, since it uses as much as digits as its factorization.

1220013220121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1220013220121 its reverse (1210223100221), we get a palindrome (2430236320342).

The spelling of 1220013220121 in words is "one trillion, two hundred twenty billion, thirteen million, two hundred twenty thousand, one hundred twenty-one".