11898817123 has 4 divisors (see below), whose sum is σ = 12598747560. Its totient is φ = 11198886688.

The previous prime is 11898817121. The next prime is 11898817129. The reversal of 11898817123 is 32171889811.

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 11898817123 - 2¹ = 11898817121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11898817121) 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, 349965193 + ... + 349965226.

It is an arithmetic number, because the mean of its divisors is an integer number (3149686890).

Almost surely, 2^11898817123 is an apocalyptic number.

11898817123 is a deficient number, since it is larger than the sum of its proper divisors (699930437).

11898817123 is an equidigital number, since it uses as much as digits as its factorization.

11898817123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699930436.

The product of its digits is 193536, while the sum is 49.

The spelling of 11898817123 in words is "eleven billion, eight hundred ninety-eight million, eight hundred seventeen thousand, one hundred twenty-three".