1220351603 has 2 divisors, whose sum is σ = 1220351604. Its totient is φ = 1220351602.

The previous prime is 1220351557. The next prime is 1220351623. The reversal of 1220351603 is 3061530221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220351603 - 2¹² = 1220347507 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1220351623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610175801 + 610175802.

It is an arithmetic number, because the mean of its divisors is an integer number (610175802).

Almost surely, 2^1220351603 is an apocalyptic number.

1220351603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220351603 is an equidigital number, since it uses as much as digits as its factorization.

1220351603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1220351603 is about 34933.5312128619. The cubic root of 1220351603 is about 1068.6323700867.

Adding to 1220351603 its reverse (3061530221), we get a palindrome (4281881824).

The spelling of 1220351603 in words is "one billion, two hundred twenty million, three hundred fifty-one thousand, six hundred three".