13431121222 has 4 divisors (see below), whose sum is σ = 20146681836. Its totient is φ = 6715560610.

The previous prime is 13431121213. The next prime is 13431121237. The reversal of 13431121222 is 22212113431.

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

It is a junction number, because it is equal to n+sod(n) for n = 13431121193 and 13431121202.

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, 3357780304 + ... + 3357780307.

It is an arithmetic number, because the mean of its divisors is an integer number (5036670459).

Almost surely, 2^13431121222 is an apocalyptic number.

13431121222 is a deficient number, since it is larger than the sum of its proper divisors (6715560614).

13431121222 is an equidigital number, since it uses as much as digits as its factorization.

13431121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6715560613.

The product of its digits is 576, while the sum is 22.

Adding to 13431121222 its reverse (22212113431), we get a palindrome (35643234653).

The spelling of 13431121222 in words is "thirteen billion, four hundred thirty-one million, one hundred twenty-one thousand, two hundred twenty-two".