1311641204203 has 24 divisors (see below), whose sum is σ = 1490676496848. Its totient is φ = 1144246368000.

The previous prime is 1311641204183. The next prime is 1311641204221. The reversal of 1311641204203 is 3024021461131.

It is a de Polignac number, because none of the positive numbers 2^k-1311641204203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311641204243) 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, 546525 + ... + 1709377.

It is an arithmetic number, because the mean of its divisors is an integer number (62111520702).

Almost surely, 2^{1311641204203} is an apocalyptic number.

1311641204203 is a deficient number, since it is larger than the sum of its proper divisors (179035292645).

1311641204203 is a wasteful number, since it uses less digits than its factorization.

1311641204203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163007 (or 1162966 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 1311641204203 its reverse (3024021461131), we get a palindrome (4335662665334).

The spelling of 1311641204203 in words is "one trillion, three hundred eleven billion, six hundred forty-one million, two hundred four thousand, two hundred three".