13121231122 has 4 divisors (see below), whose sum is σ = 19681846686. Its totient is φ = 6560615560.

The previous prime is 13121231099. The next prime is 13121231141. The reversal of 13121231122 is 22113212131.

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

It can be written as a sum of positive squares in only one way, i.e., 12526310241 + 594920881 = 111921^2 + 24391^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13121231122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280307779 + ... + 3280307782.

Almost surely, 2^13121231122 is an apocalyptic number.

13121231122 is a deficient number, since it is larger than the sum of its proper divisors (6560615564).

13121231122 is an equidigital number, since it uses as much as digits as its factorization.

13121231122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6560615563.

The product of its digits is 144, while the sum is 19.

Adding to 13121231122 its reverse (22113212131), we get a palindrome (35234443253).

The spelling of 13121231122 in words is "thirteen billion, one hundred twenty-one million, two hundred thirty-one thousand, one hundred twenty-two".