13023121 has 4 divisors (see below), whose sum is σ = 13036032. Its totient is φ = 13010212.

The previous prime is 13023119. The next prime is 13023133. The reversal of 13023121 is 12132031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12132031 = 523 ⋅23197.

It is a cyclic number.

It is not a de Polignac number, because 13023121 - 2¹ = 13023119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13023181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4801 + ... + 7006.

It is an arithmetic number, because the mean of its divisors is an integer number (3259008).

Almost surely, 2^13023121 is an apocalyptic number.

It is an amenable number.

13023121 is a deficient number, since it is larger than the sum of its proper divisors (12911).

13023121 is a wasteful number, since it uses less digits than its factorization.

13023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12910.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 13023121 is about 3608.7561569050. The cubic root of 13023121 is about 235.2727841847.

Adding to 13023121 its reverse (12132031), we get a palindrome (25155152).

The spelling of 13023121 in words is "thirteen million, twenty-three thousand, one hundred twenty-one".