12121121110213 has 2 divisors, whose sum is σ = 12121121110214. Its totient is φ = 12121121110212.

The previous prime is 12121121110207. The next prime is 12121121110229. The reversal of 12121121110213 is 31201112112121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6109513458049 + 6011607652164 = 2471743^2 + 2451858^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121121110213 - 2⁹ = 12121121109701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121121114213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060560555106 + 6060560555107.

It is an arithmetic number, because the mean of its divisors is an integer number (6060560555107).

Almost surely, 2^{12121121110213} is an apocalyptic number.

It is an amenable number.

12121121110213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121121110213 is an equidigital number, since it uses as much as digits as its factorization.

12121121110213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 12121121110213 its reverse (31201112112121), we get a palindrome (43322233222334).

The spelling of 12121121110213 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred ten thousand, two hundred thirteen".