20112100121189 has 2 divisors, whose sum is σ = 20112100121190. Its totient is φ = 20112100121188.

The previous prime is 20112100121167. The next prime is 20112100121209. The reversal of 20112100121189 is 98112100121102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20028686016964 + 83414104225 = 4475342^2 + 288815^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112100121189 - 2¹² = 20112100117093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20112100121129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056050060594 + 10056050060595.

It is an arithmetic number, because the mean of its divisors is an integer number (10056050060595).

Almost surely, 2^{20112100121189} is an apocalyptic number.

It is an amenable number.

20112100121189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112100121189 is an equidigital number, since it uses as much as digits as its factorization.

20112100121189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 29.

The spelling of 20112100121189 in words is "twenty trillion, one hundred twelve billion, one hundred million, one hundred twenty-one thousand, one hundred eighty-nine".