13121198 has 4 divisors (see below), whose sum is σ = 19681800. Its totient is φ = 6560598.

The previous prime is 13121159. The next prime is 13121203. The reversal of 13121198 is 89112131.

13121198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89112131 = 1997 ⋅44623.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280298 + ... + 3280301.

It is an arithmetic number, because the mean of its divisors is an integer number (4920450).

Almost surely, 2^13121198 is an apocalyptic number.

13121198 is a deficient number, since it is larger than the sum of its proper divisors (6560602).

13121198 is an equidigital number, since it uses as much as digits as its factorization.

13121198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560601.

The product of its digits is 432, while the sum is 26.

The square root of 13121198 is about 3622.3194226904. The cubic root of 13121198 is about 235.8619200892.

The spelling of 13121198 in words is "thirteen million, one hundred twenty-one thousand, one hundred ninety-eight".