2101321331020 has 48 divisors (see below), whose sum is σ = 4488695961120. Its totient is φ = 826074523136.

The previous prime is 2101321330991. The next prime is 2101321331029. The reversal of 2101321331020 is 201331231012.

It is not an unprimeable number, because it can be changed into a prime (2101321331029) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4513464 + ... + 4957216.

It is an arithmetic number, because the mean of its divisors is an integer number (93514499190).

Almost surely, 2^{2101321331020} is an apocalyptic number.

2101321331020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101321331020 is an abundant number, since it is smaller than the sum of its proper divisors (2387374630100).

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

2101321331020 is a wasteful number, since it uses less digits than its factorization.

2101321331020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447834 (or 447832 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 2101321331020 its reverse (201331231012), we get a palindrome (2302652562032).

The spelling of 2101321331020 in words is "two trillion, one hundred one billion, three hundred twenty-one million, three hundred thirty-one thousand, twenty".