1121320312002 has 80 divisors (see below), whose sum is σ = 2744491492512. Its totient is φ = 339361850880.

The previous prime is 1121320311997. The next prime is 1121320312033. The reversal of 1121320312002 is 2002130231211.

1121320312002 is a `hidden beast` number, since 11 + 21 + 320 + 312 + 0 + 0 + 2 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1002658 + ... + 1802210.

Almost surely, 2^{1121320312002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121320312002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1372245746256).

1121320312002 is an abundant number, since it is smaller than the sum of its proper divisors (1623171180510).

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

1121320312002 is a wasteful number, since it uses less digits than its factorization.

1121320312002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800365 (or 800356 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1121320312002 its reverse (2002130231211), we get a palindrome (3123450543213).

The spelling of 1121320312002 in words is "one trillion, one hundred twenty-one billion, three hundred twenty million, three hundred twelve thousand, two".