13000012121221 has 4 divisors (see below), whose sum is σ = 13003093427200. Its totient is φ = 12996930815244.

The previous prime is 13000012121197. The next prime is 13000012121249. The reversal of 13000012121221 is 12212121000031.

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 13000012121221 - 2²³ = 13000003732613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13000012121195 and 13000012121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13000012121021) 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, 1540646661 + ... + 1540655098.

It is an arithmetic number, because the mean of its divisors is an integer number (3250773356800).

Almost surely, 2^{13000012121221} is an apocalyptic number.

It is an amenable number.

13000012121221 is a deficient number, since it is larger than the sum of its proper divisors (3081305979).

13000012121221 is an equidigital number, since it uses as much as digits as its factorization.

13000012121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081305978.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 13000012121221 its reverse (12212121000031), we get a palindrome (25212133121252).

The spelling of 13000012121221 in words is "thirteen trillion, twelve million, one hundred twenty-one thousand, two hundred twenty-one".