12121010212213 has 4 divisors (see below), whose sum is σ = 13852583099680. Its totient is φ = 10389437324748.

The previous prime is 12121010212193. The next prime is 12121010212217. The reversal of 12121010212213 is 31221201012121.

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 12121010212213 - 2²¹ = 12121008115061 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 (12121010212217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865786443723 + ... + 865786443736.

It is an arithmetic number, because the mean of its divisors is an integer number (3463145774920).

Almost surely, 2^{12121010212213} is an apocalyptic number.

It is an amenable number.

12121010212213 is a deficient number, since it is larger than the sum of its proper divisors (1731572887467).

12121010212213 is an equidigital number, since it uses as much as digits as its factorization.

12121010212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731572887466.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 12121010212213 its reverse (31221201012121), we get a palindrome (43342211224334).

The spelling of 12121010212213 in words is "twelve trillion, one hundred twenty-one billion, ten million, two hundred twelve thousand, two hundred thirteen".