1021320332020 has 12 divisors (see below), whose sum is σ = 2144772697284. Its totient is φ = 408528132800.

The previous prime is 1021320332009. The next prime is 1021320332023. The reversal of 1021320332020 is 202330231201.

It can be written as a sum of positive squares in 2 ways, for example, as 336302567056 + 685017764964 = 579916^2 + 827658^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021320332023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25533008281 + ... + 25533008320.

It is an arithmetic number, because the mean of its divisors is an integer number (178731058107).

Almost surely, 2^{1021320332020} is an apocalyptic number.

1021320332020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021320332020 is an abundant number, since it is smaller than the sum of its proper divisors (1123452365264).

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

1021320332020 is a wasteful number, since it uses less digits than its factorization.

1021320332020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51066016610 (or 51066016608 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 1021320332020 its reverse (202330231201), we get a palindrome (1223650563221).

The spelling of 1021320332020 in words is "one trillion, twenty-one billion, three hundred twenty million, three hundred thirty-two thousand, twenty".