13121030111123 has 4 divisors (see below), whose sum is σ = 14313851030328. Its totient is φ = 11928209191920.

The previous prime is 13121030111099. The next prime is 13121030111179. The reversal of 13121030111123 is 32111103012131.

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

It is a cyclic number.

It is not a de Polignac number, because 13121030111123 - 2¹⁰ = 13121030110099 is a prime.

It is a super-2 number, since 2×13121030111123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121030111095 and 13121030111104.

It is not an unprimeable number, because it can be changed into a prime (13121030119123) 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, 596410459586 + ... + 596410459607.

It is an arithmetic number, because the mean of its divisors is an integer number (3578462757582).

Almost surely, 2^{13121030111123} is an apocalyptic number.

13121030111123 is a deficient number, since it is larger than the sum of its proper divisors (1192820919205).

13121030111123 is a wasteful number, since it uses less digits than its factorization.

13121030111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192820919204.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 13121030111123 its reverse (32111103012131), we get a palindrome (45232133123254).

The spelling of 13121030111123 in words is "thirteen trillion, one hundred twenty-one billion, thirty million, one hundred eleven thousand, one hundred twenty-three".