12113233131221 has 2 divisors, whose sum is σ = 12113233131222. Its totient is φ = 12113233131220.

The previous prime is 12113233131217. The next prime is 12113233131271. The reversal of 12113233131221 is 12213133231121.

12113233131221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9441270202225 + 2671962928996 = 3072665^2 + 1634614^2 .

It is a cyclic number.

It is not a de Polignac number, because 12113233131221 - 2² = 12113233131217 is a prime.

It is a super-2 number, since 2×12113233131221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12113233131271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056616565610 + 6056616565611.

It is an arithmetic number, because the mean of its divisors is an integer number (6056616565611).

Almost surely, 2^{12113233131221} is an apocalyptic number.

It is an amenable number.

12113233131221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12113233131221 is an equidigital number, since it uses as much as digits as its factorization.

12113233131221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

Adding to 12113233131221 its reverse (12213133231121), we get a palindrome (24326366362342).

The spelling of 12113233131221 in words is "twelve trillion, one hundred thirteen billion, two hundred thirty-three million, one hundred thirty-one thousand, two hundred twenty-one".