1321012332000 has 288 divisors, whose sum is σ = 4814987696064. Its totient is φ = 342748800000.

The previous prime is 1321012331983. The next prime is 1321012332001. The reversal of 1321012332000 is 2332101231.

1321012332000 is a `hidden beast` number, since 1 + 321 + 0 + 1 + 23 + 320 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321012332001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 836125 + ... + 1827875.

It is an arithmetic number, because the mean of its divisors is an integer number (16718707278).

Almost surely, 2^{1321012332000} is an apocalyptic number.

1321012332000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321012332000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2407493848032).

1321012332000 is an abundant number, since it is smaller than the sum of its proper divisors (3493975364064).

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

1321012332000 is a wasteful number, since it uses less digits than its factorization.

1321012332000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991819 (or 991798 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1321012332000 its reverse (2332101231), we get a palindrome (1323344433231).

The spelling of 1321012332000 in words is "one trillion, three hundred twenty-one billion, twelve million, three hundred thirty-two thousand".