1221332322203 has 16 divisors (see below), whose sum is σ = 1489965949440. Its totient is φ = 977790139200.

The previous prime is 1221332322163. The next prime is 1221332322239. The reversal of 1221332322203 is 3022232331221.

It is not a de Polignac number, because 1221332322203 - 2⁶ = 1221332322139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221332322803) 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, 64659218 + ... + 64678103.

It is an arithmetic number, because the mean of its divisors is an integer number (93122871840).

Almost surely, 2^{1221332322203} is an apocalyptic number.

1221332322203 is a deficient number, since it is larger than the sum of its proper divisors (268633627237).

1221332322203 is a wasteful number, since it uses less digits than its factorization.

1221332322203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129337418.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 1221332322203 its reverse (3022232331221), we get a palindrome (4243564653424).

The spelling of 1221332322203 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-two million, three hundred twenty-two thousand, two hundred three".