1220353203 has 16 divisors (see below), whose sum is σ = 1672130720. Its totient is φ = 791099136.

The previous prime is 1220353193. The next prime is 1220353213. The reversal of 1220353203 is 3023530221.

It is an interprime number because it is at equal distance from previous prime (1220353193) and next prime (1220353213).

It is not a de Polignac number, because 1220353203 - 2¹² = 1220349107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220353203.

It is not an unprimeable number, because it can be changed into a prime (1220353213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321903 + ... + 325671.

It is an arithmetic number, because the mean of its divisors is an integer number (104508170).

Almost surely, 2^1220353203 is an apocalyptic number.

1220353203 is a deficient number, since it is larger than the sum of its proper divisors (451777517).

1220353203 is a wasteful number, since it uses less digits than its factorization.

1220353203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6726.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 1220353203 is about 34933.5541134881. The cubic root of 1220353203 is about 1068.6328371136.

Adding to 1220353203 its reverse (3023530221), we get a palindrome (4243883424).

The spelling of 1220353203 in words is "one billion, two hundred twenty million, three hundred fifty-three thousand, two hundred three".