1321311010203 has 24 divisors (see below), whose sum is σ = 1974943917440. Its totient is φ = 850374391680.

The previous prime is 1321311010177. The next prime is 1321311010211. The reversal of 1321311010203 is 3020101131231.

1321311010203 is a `hidden beast` number, since 1 + 321 + 311 + 0 + 10 + 20 + 3 = 666.

It is not a de Polignac number, because 1321311010203 - 2³² = 1317016042907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321311010403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5675476 + ... + 5903697.

Almost surely, 2^{1321311010203} is an apocalyptic number.

1321311010203 is a deficient number, since it is larger than the sum of its proper divisors (653632907237).

1321311010203 is a wasteful number, since it uses less digits than its factorization.

1321311010203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11579619 (or 11579616 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1321311010203 its reverse (3020101131231), we get a palindrome (4341412141434).

The spelling of 1321311010203 in words is "one trillion, three hundred twenty-one billion, three hundred eleven million, ten thousand, two hundred three".