1311203332020 has 24 divisors (see below), whose sum is σ = 3671369329824. Its totient is φ = 349654221856.

The previous prime is 1311203332007. The next prime is 1311203332037. The reversal of 1311203332020 is 202333021131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10926694374 + ... + 10926694493.

It is an arithmetic number, because the mean of its divisors is an integer number (152973722076).

Almost surely, 2^{1311203332020} is an apocalyptic number.

1311203332020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311203332020 is an abundant number, since it is smaller than the sum of its proper divisors (2360165997804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311203332020 is a wasteful number, since it uses less digits than its factorization.

1311203332020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21853388879 (or 21853388877 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1311203332020 its reverse (202333021131), we get a palindrome (1513536353151).

The spelling of 1311203332020 in words is "one trillion, three hundred eleven billion, two hundred three million, three hundred thirty-two thousand, twenty".