1020331202021 has 2 divisors, whose sum is σ = 1020331202022. Its totient is φ = 1020331202020.

The previous prime is 1020331201999. The next prime is 1020331202053. The reversal of 1020331202021 is 1202021330201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 813225204100 + 207105997921 = 901790^2 + 455089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020331202021 - 2¹⁴ = 1020331185637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020331202521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510165601010 + 510165601011.

It is an arithmetic number, because the mean of its divisors is an integer number (510165601011).

Almost surely, 2^{1020331202021} is an apocalyptic number.

It is an amenable number.

1020331202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020331202021 is an equidigital number, since it uses as much as digits as its factorization.

1020331202021 is an evil number, because the sum of its binary digits is even.

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

Adding to 1020331202021 its reverse (1202021330201), we get a palindrome (2222352532222).

The spelling of 1020331202021 in words is "one trillion, twenty billion, three hundred thirty-one million, two hundred two thousand, twenty-one".