13023512421 has 4 divisors (see below), whose sum is σ = 17364683232. Its totient is φ = 8682341612.

The previous prime is 13023512419. The next prime is 13023512431. The reversal of 13023512421 is 12421532031.

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.

It is a cyclic number.

It is not a de Polignac number, because 13023512421 - 2¹ = 13023512419 is a prime.

It is a super-2 number, since 2×13023512421² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13023512391 and 13023512400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13023512431) 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, 2170585401 + ... + 2170585406.

It is an arithmetic number, because the mean of its divisors is an integer number (4341170808).

Almost surely, 2^13023512421 is an apocalyptic number.

It is an amenable number.

13023512421 is a deficient number, since it is larger than the sum of its proper divisors (4341170811).

13023512421 is an equidigital number, since it uses as much as digits as its factorization.

13023512421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4341170810.

The product of its (nonzero) digits is 1440, while the sum is 24.

The spelling of 13023512421 in words is "thirteen billion, twenty-three million, five hundred twelve thousand, four hundred twenty-one".