1213433102221 has 2 divisors, whose sum is σ = 1213433102222. Its totient is φ = 1213433102220.

The previous prime is 1213433102201. The next prime is 1213433102293. The reversal of 1213433102221 is 1222013343121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1177791438121 + 35641664100 = 1085261^2 + 188790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213433102221 - 2²¹ = 1213431005069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213433102201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606716551110 + 606716551111.

It is an arithmetic number, because the mean of its divisors is an integer number (606716551111).

Almost surely, 2^{1213433102221} is an apocalyptic number.

It is an amenable number.

1213433102221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213433102221 is an equidigital number, since it uses as much as digits as its factorization.

1213433102221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1213433102221 its reverse (1222013343121), we get a palindrome (2435446445342).

The spelling of 1213433102221 in words is "one trillion, two hundred thirteen billion, four hundred thirty-three million, one hundred two thousand, two hundred twenty-one".