2171223224887 has 12 divisors (see below), whose sum is σ = 2291579354856. Its totient is φ = 2056888397520.

The previous prime is 2171223224881. The next prime is 2171223224941. The reversal of 2171223224887 is 7884223221712.

It is not a de Polignac number, because 2171223224887 - 2³ = 2171223224879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2171223224887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171223224881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16852648 + ... + 16980994.

It is an arithmetic number, because the mean of its divisors is an integer number (190964946238).

Almost surely, 2^{2171223224887} is an apocalyptic number.

2171223224887 is a deficient number, since it is larger than the sum of its proper divisors (120356129969).

2171223224887 is a wasteful number, since it uses less digits than its factorization.

2171223224887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175246 (or 175227 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 49.

The spelling of 2171223224887 in words is "two trillion, one hundred seventy-one billion, two hundred twenty-three million, two hundred twenty-four thousand, eight hundred eighty-seven".