1321102203 has 4 divisors (see below), whose sum is σ = 1761469608. Its totient is φ = 880734800.

The previous prime is 1321102121. The next prime is 1321102207. The reversal of 1321102203 is 3022011231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1321102203 - 2¹⁴ = 1321085819 is a prime.

It is a super-2 number, since 2×1321102203² = 3490622061542906418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321102207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220183698 + ... + 220183703.

It is an arithmetic number, because the mean of its divisors is an integer number (440367402).

Almost surely, 2^1321102203 is an apocalyptic number.

1321102203 is a deficient number, since it is larger than the sum of its proper divisors (440367405).

1321102203 is an equidigital number, since it uses as much as digits as its factorization.

1321102203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440367404.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1321102203 is about 36346.9696536039. The cubic root of 1321102203 is about 1097.2665472736.

Adding to 1321102203 its reverse (3022011231), we get a palindrome (4343113434).

The spelling of 1321102203 in words is "one billion, three hundred twenty-one million, one hundred two thousand, two hundred three".