12121321213 has 8 divisors (see below), whose sum is σ = 12404848896. Its totient is φ = 11837868000.

The previous prime is 12121321211. The next prime is 12121321229. The reversal of 12121321213 is 31212312121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12121321213 - 2¹ = 12121321211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121321211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442548 + ... + 469138.

It is an arithmetic number, because the mean of its divisors is an integer number (1550606112).

Almost surely, 2^12121321213 is an apocalyptic number.

It is an amenable number.

12121321213 is a deficient number, since it is larger than the sum of its proper divisors (283527683).

12121321213 is a wasteful number, since it uses less digits than its factorization.

12121321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37235.

The product of its digits is 144, while the sum is 19.

Adding to 12121321213 its reverse (31212312121), we get a palindrome (43333633334).

The spelling of 12121321213 in words is "twelve billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred thirteen".