13423421111 has 4 divisors (see below), whose sum is σ = 13425271512. Its totient is φ = 13421570712.

The previous prime is 13423421101. The next prime is 13423421129. The reversal of 13423421111 is 11112432431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11112432431 = 199 ⋅55841369.

It is a cyclic number.

It is not a de Polignac number, because 13423421111 - 2⁶ = 13423421047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13423421101) 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, 914276 + ... + 928841.

It is an arithmetic number, because the mean of its divisors is an integer number (3356317878).

Almost surely, 2^13423421111 is an apocalyptic number.

13423421111 is a deficient number, since it is larger than the sum of its proper divisors (1850401).

13423421111 is an equidigital number, since it uses as much as digits as its factorization.

13423421111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850400.

The product of its digits is 576, while the sum is 23.

Adding to 13423421111 its reverse (11112432431), we get a palindrome (24535853542).

The spelling of 13423421111 in words is "thirteen billion, four hundred twenty-three million, four hundred twenty-one thousand, one hundred eleven".