1220244013 has 2 divisors, whose sum is σ = 1220244014. Its totient is φ = 1220244012.

The previous prime is 1220244007. The next prime is 1220244029. The reversal of 1220244013 is 3104420221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1066806244 + 153437769 = 32662^2 + 12387^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220244013 - 2¹⁷ = 1220112941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220244043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610122006 + 610122007.

It is an arithmetic number, because the mean of its divisors is an integer number (610122007).

Almost surely, 2^1220244013 is an apocalyptic number.

It is an amenable number.

1220244013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220244013 is an equidigital number, since it uses as much as digits as its factorization.

1220244013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1220244013 is about 34931.9912544361. The cubic root of 1220244013 is about 1068.6009645105.

Adding to 1220244013 its reverse (3104420221), we get a palindrome (4324664234).

The spelling of 1220244013 in words is "one billion, two hundred twenty million, two hundred forty-four thousand, thirteen".