12121201212213 has 4 divisors (see below), whose sum is σ = 16161601616288. Its totient is φ = 8080800808140.

The previous prime is 12121201212191. The next prime is 12121201212259. The reversal of 12121201212213 is 31221210212121.

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 not a de Polignac number, because 12121201212213 - 2⁵ = 12121201212181 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121201212213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121201212293) 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, 2020200202033 + ... + 2020200202038.

It is an arithmetic number, because the mean of its divisors is an integer number (4040400404072).

Almost surely, 2^{12121201212213} is an apocalyptic number.

It is an amenable number.

12121201212213 is a deficient number, since it is larger than the sum of its proper divisors (4040400404075).

12121201212213 is an equidigital number, since it uses as much as digits as its factorization.

12121201212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040400404074.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 12121201212213 its reverse (31221210212121), we get a palindrome (43342411424334).

The spelling of 12121201212213 in words is "twelve trillion, one hundred twenty-one billion, two hundred one million, two hundred twelve thousand, two hundred thirteen".