20021133331 has 2 divisors, whose sum is σ = 20021133332. Its totient is φ = 20021133330.

The previous prime is 20021133329. The next prime is 20021133371. The reversal of 20021133331 is 13333112002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20021133331 - 2¹ = 20021133329 is a prime.

It is a super-2 number, since 2×20021133331² (a number of 21 digits) contains 22 as substring.

Together with 20021133329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20021133299 and 20021133308.

It is not a weakly prime, because it can be changed into another prime (20021133371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010566665 + 10010566666.

It is an arithmetic number, because the mean of its divisors is an integer number (10010566666).

Almost surely, 2^20021133331 is an apocalyptic number.

20021133331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021133331 is an equidigital number, since it uses as much as digits as its factorization.

20021133331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20021133331 its reverse (13333112002), we get a palindrome (33354245333).

The spelling of 20021133331 in words is "twenty billion, twenty-one million, one hundred thirty-three thousand, three hundred thirty-one".