1113103211221 has 2 divisors, whose sum is σ = 1113103211222. Its totient is φ = 1113103211220.

The previous prime is 1113103211197. The next prime is 1113103211243. The reversal of 1113103211221 is 1221123013111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 735014728900 + 378088482321 = 857330^2 + 614889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113103211221 - 2²³ = 1113094822613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113103211261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556551605610 + 556551605611.

It is an arithmetic number, because the mean of its divisors is an integer number (556551605611).

Almost surely, 2^{1113103211221} is an apocalyptic number.

It is an amenable number.

1113103211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113103211221 is an equidigital number, since it uses as much as digits as its factorization.

1113103211221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1113103211221 its reverse (1221123013111), we get a palindrome (2334226224332).

The spelling of 1113103211221 in words is "one trillion, one hundred thirteen billion, one hundred three million, two hundred eleven thousand, two hundred twenty-one".