2187475088821 has 4 divisors (see below), whose sum is σ = 2386336460544. Its totient is φ = 1988613717100.

The previous prime is 2187475088801. The next prime is 2187475088831. The reversal of 2187475088821 is 1288805747812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2187475088821 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 2187475088821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187475088801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99430685845 + ... + 99430685866.

It is an arithmetic number, because the mean of its divisors is an integer number (596584115136).

Almost surely, 2^{2187475088821} is an apocalyptic number.

It is an amenable number.

2187475088821 is a deficient number, since it is larger than the sum of its proper divisors (198861371723).

2187475088821 is a wasteful number, since it uses less digits than its factorization.

2187475088821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198861371722.

The product of its (nonzero) digits is 16056320, while the sum is 61.

The spelling of 2187475088821 in words is "two trillion, one hundred eighty-seven billion, four hundred seventy-five million, eighty-eight thousand, eight hundred twenty-one".