1101311221203 has 64 divisors (see below), whose sum is σ = 1695095001600. Its totient is φ = 705846960000.

The previous prime is 1101311221189. The next prime is 1101311221321. The reversal of 1101311221203 is 3021221131011.

1101311221203 is a `hidden beast` number, since 110 + 1 + 311 + 221 + 20 + 3 = 666.

It is not a de Polignac number, because 1101311221203 - 2¹⁶ = 1101311155667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1101311228203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 188223228 + ... + 188229078.

It is an arithmetic number, because the mean of its divisors is an integer number (26485859400).

Almost surely, 2^{1101311221203} is an apocalyptic number.

1101311221203 is a deficient number, since it is larger than the sum of its proper divisors (593783780397).

1101311221203 is a wasteful number, since it uses less digits than its factorization.

1101311221203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6881 (or 6875 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1101311221203 its reverse (3021221131011), we get a palindrome (4122532352214).

The spelling of 1101311221203 in words is "one trillion, one hundred one billion, three hundred eleven million, two hundred twenty-one thousand, two hundred three".