1021320231200 has 72 divisors (see below), whose sum is σ = 2517504994368. Its totient is φ = 404561767680.

The previous prime is 1021320231199. The next prime is 1021320231259. The reversal of 1021320231200 is 21320231201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6114932 + ... + 6279731.

It is an arithmetic number, because the mean of its divisors is an integer number (34965347144).

Almost surely, 2^{1021320231200} is an apocalyptic number.

1021320231200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021320231200 is an abundant number, since it is smaller than the sum of its proper divisors (1496184763168).

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

1021320231200 is a wasteful number, since it uses less digits than its factorization.

1021320231200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12394786 (or 12394773 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1021320231200 its reverse (21320231201), we get a palindrome (1042640462401).

Subtracting from 1021320231200 its reverse (21320231201), we obtain a palindrome (999999999999).

The spelling of 1021320231200 in words is "one trillion, twenty-one billion, three hundred twenty million, two hundred thirty-one thousand, two hundred".