21020332003057 has 2 divisors, whose sum is σ = 21020332003058. Its totient is φ = 21020332003056.

The previous prime is 21020332003043. The next prime is 21020332003171. The reversal of 21020332003057 is 75030023302012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20876117383521 + 144214619536 = 4569039^2 + 379756^2 .

It is a cyclic number.

It is not a de Polignac number, because 21020332003057 - 2³⁵ = 20985972264689 is a prime.

It is not a weakly prime, because it can be changed into another prime (21020332003007) by changing a digit.

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 as a sum of consecutive naturals, namely, 10510166001528 + 10510166001529.

It is an arithmetic number, because the mean of its divisors is an integer number (10510166001529).

Almost surely, 2^{21020332003057} is an apocalyptic number.

It is an amenable number.

21020332003057 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020332003057 is an equidigital number, since it uses as much as digits as its factorization.

21020332003057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 28.

Adding to 21020332003057 its reverse (75030023302012), we get a palindrome (96050355305069).

The spelling of 21020332003057 in words is "twenty-one trillion, twenty billion, three hundred thirty-two million, three thousand, fifty-seven".