2123523221987 has 8 divisors (see below), whose sum is σ = 2148630941520. Its totient is φ = 2098443233920.

The previous prime is 2123523221947. The next prime is 2123523222013. The reversal of 2123523221987 is 7891223253212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2123523221987 - 2⁴⁰ = 1024011594211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123523221947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6778793 + ... + 7085130.

It is an arithmetic number, because the mean of its divisors is an integer number (268578867690).

Almost surely, 2^{2123523221987} is an apocalyptic number.

2123523221987 is a deficient number, since it is larger than the sum of its proper divisors (25107719533).

2123523221987 is a wasteful number, since it uses less digits than its factorization.

2123523221987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13865733.

The product of its digits is 725760, while the sum is 47.

The spelling of 2123523221987 in words is "two trillion, one hundred twenty-three billion, five hundred twenty-three million, two hundred twenty-one thousand, nine hundred eighty-seven".