1321120311000 has 192 divisors, whose sum is σ = 4794858413280. Its totient is φ = 301970323200.

The previous prime is 1321120310981. The next prime is 1321120311047. The reversal of 1321120311000 is 1130211231.

It is a happy number.

It is a super-2 number, since 2×1321120311000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 4346607 + ... + 4640606.

Almost surely, 2^{1321120311000} is an apocalyptic number.

1321120311000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321120311000 is an abundant number, since it is smaller than the sum of its proper divisors (3473738102280).

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

1321120311000 is a wasteful number, since it uses less digits than its factorization.

1321120311000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8987251 (or 8987230 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1321120311000 its reverse (1130211231), we get a palindrome (1322250522231).

The spelling of 1321120311000 in words is "one trillion, three hundred twenty-one billion, one hundred twenty million, three hundred eleven thousand".