1220020013 has 2 divisors, whose sum is σ = 1220020014. Its totient is φ = 1220020012.

The previous prime is 1220019967. The next prime is 1220020093. The reversal of 1220020013 is 3100200221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1146025609 + 73994404 = 33853^2 + 8602^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220020013 - 2¹² = 1220015917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220019976 and 1220020003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220020093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610010006 + 610010007.

It is an arithmetic number, because the mean of its divisors is an integer number (610010007).

Almost surely, 2^1220020013 is an apocalyptic number.

It is an amenable number.

1220020013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220020013 is an equidigital number, since it uses as much as digits as its factorization.

1220020013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1220020013 is about 34928.7848772327. The cubic root of 1220020013 is about 1068.5355728725.

Adding to 1220020013 its reverse (3100200221), we get a palindrome (4320220234).

The spelling of 1220020013 in words is "one billion, two hundred twenty million, twenty thousand, thirteen".