13121021112123 has 32 divisors (see below), whose sum is σ = 17992100505600. Its totient is φ = 8502927054336.

The previous prime is 13121021112077. The next prime is 13121021112131. The reversal of 13121021112123 is 32121112012131.

It is not a de Polignac number, because 13121021112123 - 2¹⁶ = 13121021046587 is a prime.

It is a super-2 number, since 2×13121021112123² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13121021112123.

It is not an unprimeable number, because it can be changed into a prime (13121021112323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3579786 + ... + 6249552.

It is an arithmetic number, because the mean of its divisors is an integer number (562253140800).

Almost surely, 2^{13121021112123} is an apocalyptic number.

13121021112123 is a deficient number, since it is larger than the sum of its proper divisors (4871079393477).

13121021112123 is a wasteful number, since it uses less digits than its factorization.

13121021112123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670171.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 13121021112123 its reverse (32121112012131), we get a palindrome (45242133124254).

The spelling of 13121021112123 in words is "thirteen trillion, one hundred twenty-one billion, twenty-one million, one hundred twelve thousand, one hundred twenty-three".