2002198123 has 4 divisors (see below), whose sum is σ = 2002318560. Its totient is φ = 2002077688.

The previous prime is 2002198109. The next prime is 2002198129. The reversal of 2002198123 is 3218912002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3218912002 = 2 ⋅1609456001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002198123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002198091 and 2002198100.

It is not an unprimeable number, because it can be changed into a prime (2002198129) 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, 30340 + ... + 70177.

It is an arithmetic number, because the mean of its divisors is an integer number (500579640).

Almost surely, 2^2002198123 is an apocalyptic number.

2002198123 is a deficient number, since it is larger than the sum of its proper divisors (120437).

2002198123 is a wasteful number, since it uses less digits than its factorization.

2002198123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120436.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2002198123 is about 44745.9285633900. The cubic root of 2002198123 is about 1260.3824578039.

The spelling of 2002198123 in words is "two billion, two million, one hundred ninety-eight thousand, one hundred twenty-three".