2002123231 has 4 divisors (see below), whose sum is σ = 2002255200. Its totient is φ = 2001991264.

The previous prime is 2002123223. The next prime is 2002123241. The reversal of 2002123231 is 1323212002.

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

It is a cyclic number.

It is not a de Polignac number, because 2002123231 - 2³ = 2002123223 is a prime.

It is a super-2 number, since 2×2002123231² = 8016994864219758722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002123241) 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, 39751 + ... + 74728.

It is an arithmetic number, because the mean of its divisors is an integer number (500563800).

Almost surely, 2^2002123231 is an apocalyptic number.

2002123231 is a deficient number, since it is larger than the sum of its proper divisors (131969).

2002123231 is a wasteful number, since it uses less digits than its factorization.

2002123231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131968.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2002123231 is about 44745.0916973024. The cubic root of 2002123231 is about 1260.3667427857.

Adding to 2002123231 its reverse (1323212002), we get a palindrome (3325335233).

The spelling of 2002123231 in words is "two billion, two million, one hundred twenty-three thousand, two hundred thirty-one".