11820029123 has 4 divisors (see below), whose sum is σ = 13508604720. Its totient is φ = 10131453528.

The previous prime is 11820029083. The next prime is 11820029129. The reversal of 11820029123 is 32192002811.

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

It is not a de Polignac number, because 11820029123 - 2¹⁶ = 11819963587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11820029129) 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, 844287788 + ... + 844287801.

It is an arithmetic number, because the mean of its divisors is an integer number (3377151180).

Almost surely, 2^11820029123 is an apocalyptic number.

11820029123 is a deficient number, since it is larger than the sum of its proper divisors (1688575597).

11820029123 is an equidigital number, since it uses as much as digits as its factorization.

11820029123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688575596.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 11820029123 in words is "eleven billion, eight hundred twenty million, twenty-nine thousand, one hundred twenty-three".