20221231132789 has 2 divisors, whose sum is σ = 20221231132790. Its totient is φ = 20221231132788.

The previous prime is 20221231132747. The next prime is 20221231132807. The reversal of 20221231132789 is 98723113212202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20104085802564 + 117145330225 = 4483758^2 + 342265^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221231132789 - 2²³ = 20221222744181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221231132189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110615566394 + 10110615566395.

It is an arithmetic number, because the mean of its divisors is an integer number (10110615566395).

Almost surely, 2^{20221231132789} is an apocalyptic number.

It is an amenable number.

20221231132789 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221231132789 is an equidigital number, since it uses as much as digits as its factorization.

20221231132789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 20221231132789 in words is "twenty trillion, two hundred twenty-one billion, two hundred thirty-one million, one hundred thirty-two thousand, seven hundred eighty-nine".