11213232101221 has 2 divisors, whose sum is σ = 11213232101222. Its totient is φ = 11213232101220.

The previous prime is 11213232101213. The next prime is 11213232101233. The reversal of 11213232101221 is 12210123231211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7358410344321 + 3854821756900 = 2712639^2 + 1963370^2 .

It is a cyclic number.

It is not a de Polignac number, because 11213232101221 - 2³ = 11213232101213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11213232101192 and 11213232101201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11213232101021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606616050610 + 5606616050611.

It is an arithmetic number, because the mean of its divisors is an integer number (5606616050611).

Almost surely, 2^{11213232101221} is an apocalyptic number.

It is an amenable number.

11213232101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11213232101221 is an equidigital number, since it uses as much as digits as its factorization.

11213232101221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 11213232101221 its reverse (12210123231211), we get a palindrome (23423355332432).

The spelling of 11213232101221 in words is "eleven trillion, two hundred thirteen billion, two hundred thirty-two million, one hundred one thousand, two hundred twenty-one".