1101312331203 has 16 divisors (see below), whose sum is σ = 1678236535040. Its totient is φ = 629303963616.

The previous prime is 1101312331201. The next prime is 1101312331247. The reversal of 1101312331203 is 3021332131011.

It is a happy number.

It is not a de Polignac number, because 1101312331203 - 2¹ = 1101312331201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 1101312331203.

It is not an unprimeable number, because it can be changed into a prime (1101312331201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75876 + ... + 1486062.

It is an arithmetic number, because the mean of its divisors is an integer number (104889783440).

Almost surely, 2^{1101312331203} is an apocalyptic number.

1101312331203 is a deficient number, since it is larger than the sum of its proper divisors (576924203837).

1101312331203 is a wasteful number, since it uses less digits than its factorization.

1101312331203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447386.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1101312331203 its reverse (3021332131011), we get a palindrome (4122644462214).

The spelling of 1101312331203 in words is "one trillion, one hundred one billion, three hundred twelve million, three hundred thirty-one thousand, two hundred three".