13023011221 has 4 divisors (see below), whose sum is σ = 14206921344. Its totient is φ = 11839101100.

The previous prime is 13023011191. The next prime is 13023011233. The reversal of 13023011221 is 12211032031.

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: 12211032031 = 11 ⋅1110093821.

It is a cyclic number.

It is not a de Polignac number, because 13023011221 - 2⁹ = 13023010709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13023011195 and 13023011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13023011251) 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, 591955045 + ... + 591955066.

It is an arithmetic number, because the mean of its divisors is an integer number (3551730336).

Almost surely, 2^13023011221 is an apocalyptic number.

13023011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13023011221 is a deficient number, since it is larger than the sum of its proper divisors (1183910123).

13023011221 is a wasteful number, since it uses less digits than its factorization.

13023011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183910122.

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

Adding to 13023011221 its reverse (12211032031), we get a palindrome (25234043252).

The spelling of 13023011221 in words is "thirteen billion, twenty-three million, eleven thousand, two hundred twenty-one".