1311144321020 has 48 divisors (see below), whose sum is σ = 2758023978528. Its totient is φ = 523577917440.

The previous prime is 1311144320999. The next prime is 1311144321049. The reversal of 1311144321020 is 201234411131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82262492 + ... + 82278428.

It is an arithmetic number, because the mean of its divisors is an integer number (57458832886).

Almost surely, 2^{1311144321020} is an apocalyptic number.

1311144321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311144321020 is an abundant number, since it is smaller than the sum of its proper divisors (1446879657508).

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

1311144321020 is a wasteful number, since it uses less digits than its factorization.

1311144321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22590 (or 22588 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1311144321020 its reverse (201234411131), we get a palindrome (1512378732151).

The spelling of 1311144321020 in words is "one trillion, three hundred eleven billion, one hundred forty-four million, three hundred twenty-one thousand, twenty".