20021322131191 has 2 divisors, whose sum is σ = 20021322131192. Its totient is φ = 20021322131190.

The previous prime is 20021322131149. The next prime is 20021322131221. The reversal of 20021322131191 is 19113122312002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20021322131191 - 2¹⁹ = 20021321606903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021322131791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010661065595 + 10010661065596.

It is an arithmetic number, because the mean of its divisors is an integer number (10010661065596).

Almost surely, 2^{20021322131191} is an apocalyptic number.

20021322131191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021322131191 is an equidigital number, since it uses as much as digits as its factorization.

20021322131191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

Adding to 20021322131191 its reverse (19113122312002), we get a palindrome (39134444443193).

The spelling of 20021322131191 in words is "twenty trillion, twenty-one billion, three hundred twenty-two million, one hundred thirty-one thousand, one hundred ninety-one".