1220424402013 has 2 divisors, whose sum is σ = 1220424402014. Its totient is φ = 1220424402012.

The previous prime is 1220424401981. The next prime is 1220424402049. The reversal of 1220424402013 is 3102044240221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 968929172964 + 251495229049 = 984342^2 + 501493^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220424402013 - 2⁵ = 1220424401981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220424402913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610212201006 + 610212201007.

It is an arithmetic number, because the mean of its divisors is an integer number (610212201007).

Almost surely, 2^{1220424402013} is an apocalyptic number.

It is an amenable number.

1220424402013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220424402013 is an equidigital number, since it uses as much as digits as its factorization.

1220424402013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 1220424402013 its reverse (3102044240221), we get a palindrome (4322468642234).

The spelling of 1220424402013 in words is "one trillion, two hundred twenty billion, four hundred twenty-four million, four hundred two thousand, thirteen".