2002123191 has 8 divisors (see below), whose sum is σ = 2669785200. Its totient is φ = 1334604992.

The previous prime is 2002123183. The next prime is 2002123217. The reversal of 2002123191 is 1913212002.

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 2002123191 - 2³ = 2002123183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002123181) 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, 2371 + ... + 63323.

It is an arithmetic number, because the mean of its divisors is an integer number (333723150).

Almost surely, 2^2002123191 is an apocalyptic number.

2002123191 is a deficient number, since it is larger than the sum of its proper divisors (667662009).

2002123191 is a wasteful number, since it uses less digits than its factorization.

2002123191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71905.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 2002123191 is about 44745.0912503260. The cubic root of 2002123191 is about 1260.3667343921.

Adding to 2002123191 its reverse (1913212002), we get a palindrome (3915335193).

The spelling of 2002123191 in words is "two billion, two million, one hundred twenty-three thousand, one hundred ninety-one".