13123022121 has 12 divisors (see below), whose sum is σ = 20678701680. Its totient is φ = 7953346680.

The previous prime is 13123022111. The next prime is 13123022179. The reversal of 13123022121 is 12122032131.

It is not a de Polignac number, because 13123022121 - 2⁵ = 13123022089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13123022094 and 13123022103.

It is not an unprimeable number, because it can be changed into a prime (13123022111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66277791 + ... + 66277988.

It is an arithmetic number, because the mean of its divisors is an integer number (1723225140).

Almost surely, 2^13123022121 is an apocalyptic number.

13123022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13123022121 is a deficient number, since it is larger than the sum of its proper divisors (7555679559).

13123022121 is a wasteful number, since it uses less digits than its factorization.

13123022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132555796 (or 132555793 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 13123022121 its reverse (12122032131), we get a palindrome (25245054252).

It can be divided in two parts, 131230 and 22121, that added together give a palindrome (153351).

The spelling of 13123022121 in words is "thirteen billion, one hundred twenty-three million, twenty-two thousand, one hundred twenty-one".