11222121114221 has 2 divisors, whose sum is σ = 11222121114222. Its totient is φ = 11222121114220.

The previous prime is 11222121114203. The next prime is 11222121114227. The reversal of 11222121114221 is 12241112122211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8871998388100 + 2350122726121 = 2978590^2 + 1533011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11222121114221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11222121114227) 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, 5611060557110 + 5611060557111.

It is an arithmetic number, because the mean of its divisors is an integer number (5611060557111).

Almost surely, 2^{11222121114221} is an apocalyptic number.

It is an amenable number.

11222121114221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11222121114221 is an equidigital number, since it uses as much as digits as its factorization.

11222121114221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 256, while the sum is 23.

Adding to 11222121114221 its reverse (12241112122211), we get a palindrome (23463233236432).

The spelling of 11222121114221 in words is "eleven trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred fourteen thousand, two hundred twenty-one".