11201011121221 has 2 divisors, whose sum is σ = 11201011121222. Its totient is φ = 11201011121220.

The previous prime is 11201011121173. The next prime is 11201011121231. The reversal of 11201011121221 is 12212111010211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8449108360225 + 2751902760996 = 2906735^2 + 1658886^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201011121221 - 2³⁷ = 11063572167749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11201011121195 and 11201011121204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11201011121231) 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, 5600505560610 + 5600505560611.

It is an arithmetic number, because the mean of its divisors is an integer number (5600505560611).

Almost surely, 2^{11201011121221} is an apocalyptic number.

It is an amenable number.

11201011121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201011121221 is an equidigital number, since it uses as much as digits as its factorization.

11201011121221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11201011121221 its reverse (12212111010211), we get a palindrome (23413122131432).

The spelling of 11201011121221 in words is "eleven trillion, two hundred one billion, eleven million, one hundred twenty-one thousand, two hundred twenty-one".