13121123346644 has 24 divisors (see below), whose sum is σ = 23246323396800. Its totient is φ = 6479594424576.

The previous prime is 13121123346637. The next prime is 13121123346691. The reversal of 13121123346644 is 44664332112131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34531094 + ... + 34909005.

It is an arithmetic number, because the mean of its divisors is an integer number (968596808200).

Almost surely, 2^{13121123346644} is an apocalyptic number.

It is an amenable number.

13121123346644 is a deficient number, since it is larger than the sum of its proper divisors (10125200050156).

13121123346644 is a wasteful number, since it uses less digits than its factorization.

13121123346644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69440687 (or 69440685 counting only the distinct ones).

The product of its digits is 248832, while the sum is 41.

Adding to 13121123346644 its reverse (44664332112131), we get a palindrome (57785455458775).

The spelling of 13121123346644 in words is "thirteen trillion, one hundred twenty-one billion, one hundred twenty-three million, three hundred forty-six thousand, six hundred forty-four".