20212144121189 has 2 divisors, whose sum is σ = 20212144121190. Its totient is φ = 20212144121188.

The previous prime is 20212144121137. The next prime is 20212144121227. The reversal of 20212144121189 is 98112144121202.

It is an a-pointer prime, because the next prime (20212144121227) can be obtained adding 20212144121189 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19737894280225 + 474249840964 = 4442735^2 + 688658^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212144121189 - 2⁴⁴ = 2619958076773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212144121119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106072060594 + 10106072060595.

It is an arithmetic number, because the mean of its divisors is an integer number (10106072060595).

Almost surely, 2^{20212144121189} is an apocalyptic number.

It is an amenable number.

20212144121189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212144121189 is an equidigital number, since it uses as much as digits as its factorization.

20212144121189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 38.

The spelling of 20212144121189 in words is "twenty trillion, two hundred twelve billion, one hundred forty-four million, one hundred twenty-one thousand, one hundred eighty-nine".