11001220201121 has 2 divisors, whose sum is σ = 11001220201122. Its totient is φ = 11001220201120.

The previous prime is 11001220201087. The next prime is 11001220201129. The reversal of 11001220201121 is 12110202210011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8578338054400 + 2422882146721 = 2928880^2 + 1556561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11001220201121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11001220201096 and 11001220201105.

It is not a weakly prime, because it can be changed into another prime (11001220201129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500610100560 + 5500610100561.

It is an arithmetic number, because the mean of its divisors is an integer number (5500610100561).

Almost surely, 2^{11001220201121} is an apocalyptic number.

It is an amenable number.

11001220201121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001220201121 is an equidigital number, since it uses as much as digits as its factorization.

11001220201121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11001220201121 its reverse (12110202210011), we get a palindrome (23111422411132).

The spelling of 11001220201121 in words is "eleven trillion, one billion, two hundred twenty million, two hundred one thousand, one hundred twenty-one".