13012012321 has 16 divisors (see below), whose sum is σ = 16234767360. Its totient is φ = 10131731280.

The previous prime is 13012012303. The next prime is 13012012373. The reversal of 13012012321 is 12321021031.

It is not a de Polignac number, because 13012012321 - 2¹³ = 13012004129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13012012295 and 13012012304.

It is not an unprimeable number, because it can be changed into a prime (13012012301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43450 + ... + 167068.

It is an arithmetic number, because the mean of its divisors is an integer number (1014672960).

Almost surely, 2^13012012321 is an apocalyptic number.

13012012321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13012012321 is a deficient number, since it is larger than the sum of its proper divisors (3222755039).

13012012321 is a wasteful number, since it uses less digits than its factorization.

13012012321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125004.

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

Adding to 13012012321 its reverse (12321021031), we get a palindrome (25333033352).

The spelling of 13012012321 in words is "thirteen billion, twelve million, twelve thousand, three hundred twenty-one".