1021331000000 has 98 divisors (see below), whose sum is σ = 2533349682084. Its totient is φ = 408532000000.

The previous prime is 1021330999979. The next prime is 1021331000009. The reversal of 1021331000000 is 1331201.

It is a super-2 number, since 2×1021331000000² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021331000009) 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 13 ways as a sum of consecutive naturals, for example, 489335 + ... + 1510665.

Almost surely, 2^{1021331000000} is an apocalyptic number.

1021331000000 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 1021331000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1266674841042).

1021331000000 is an abundant number, since it is smaller than the sum of its proper divisors (1512018682084).

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

1021331000000 is an frugal number, since it uses more digits than its factorization.

1021331000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021373 (or 1021338 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 1021331000000 its reverse (1331201), we get a palindrome (1021332331201).

The spelling of 1021331000000 in words is "one trillion, twenty-one billion, three hundred thirty-one million", and thus it is an aban number.