20021321301133 has 2 divisors, whose sum is σ = 20021321301134. Its totient is φ = 20021321301132.

The previous prime is 20021321301043. The next prime is 20021321301139. The reversal of 20021321301133 is 33110312312002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19501426945764 + 519894355369 = 4416042^2 + 721037^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021321301133 - 2²¹ = 20021319203981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021321301139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010660650566 + 10010660650567.

It is an arithmetic number, because the mean of its divisors is an integer number (10010660650567).

Almost surely, 2^{20021321301133} is an apocalyptic number.

It is an amenable number.

20021321301133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021321301133 is an equidigital number, since it uses as much as digits as its factorization.

20021321301133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20021321301133 its reverse (33110312312002), we get a palindrome (53131633613135).

The spelling of 20021321301133 in words is "twenty trillion, twenty-one billion, three hundred twenty-one million, three hundred one thousand, one hundred thirty-three".