2125203944189 has 4 divisors (see below), whose sum is σ = 2250215940924. Its totient is φ = 2000191947456.

The previous prime is 2125203944113. The next prime is 2125203944197. The reversal of 2125203944189 is 9814493025212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1409344116964 + 715859827225 = 1187158^2 + 846085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2125203944189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125203944389) 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 in 3 ways as a sum of consecutive naturals, for example, 62505998342 + ... + 62505998375.

It is an arithmetic number, because the mean of its divisors is an integer number (562553985231).

Almost surely, 2^{2125203944189} is an apocalyptic number.

It is an amenable number.

2125203944189 is a deficient number, since it is larger than the sum of its proper divisors (125011996735).

2125203944189 is a wasteful number, since it uses less digits than its factorization.

2125203944189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125011996734.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 2125203944189 in words is "two trillion, one hundred twenty-five billion, two hundred three million, nine hundred forty-four thousand, one hundred eighty-nine".