20021322331189 has 2 divisors, whose sum is σ = 20021322331190. Its totient is φ = 20021322331188.

The previous prime is 20021322331159. The next prime is 20021322331247. The reversal of 20021322331189 is 98113322312002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11281819580964 + 8739502750225 = 3358842^2 + 2956265^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021322331189 - 2¹⁵ = 20021322298421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021322331139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010661165594 + 10010661165595.

It is an arithmetic number, because the mean of its divisors is an integer number (10010661165595).

Almost surely, 2^{20021322331189} is an apocalyptic number.

It is an amenable number.

20021322331189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021322331189 is an equidigital number, since it uses as much as digits as its factorization.

20021322331189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 20021322331189 in words is "twenty trillion, twenty-one billion, three hundred twenty-two million, three hundred thirty-one thousand, one hundred eighty-nine".