1210012100189 has 2 divisors, whose sum is σ = 1210012100190. Its totient is φ = 1210012100188.

The previous prime is 1210012100149. The next prime is 1210012100221. The reversal of 1210012100189 is 9810012100121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 766832976100 + 443179124089 = 875690^2 + 665717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210012100189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210012100149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605006050094 + 605006050095.

It is an arithmetic number, because the mean of its divisors is an integer number (605006050095).

Almost surely, 2^{1210012100189} is an apocalyptic number.

It is an amenable number.

1210012100189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210012100189 is an equidigital number, since it uses as much as digits as its factorization.

1210012100189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 1210012100189 in words is "one trillion, two hundred ten billion, twelve million, one hundred thousand, one hundred eighty-nine".