13120121023 has 4 divisors (see below), whose sum is σ = 13120799040. Its totient is φ = 13119443008.

The previous prime is 13120120997. The next prime is 13120121051. The reversal of 13120121023 is 32012102131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13120121023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13120120988 and 13120121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120121123) 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, 309103 + ... + 348976.

It is an arithmetic number, because the mean of its divisors is an integer number (3280199760).

Almost surely, 2^13120121023 is an apocalyptic number.

13120121023 is a deficient number, since it is larger than the sum of its proper divisors (678017).

13120121023 is an equidigital number, since it uses as much as digits as its factorization.

13120121023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678016.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13120121023 its reverse (32012102131), we get a palindrome (45132223154).

The spelling of 13120121023 in words is "thirteen billion, one hundred twenty million, one hundred twenty-one thousand, twenty-three".