11221100121211 has 2 divisors, whose sum is σ = 11221100121212. Its totient is φ = 11221100121210.

The previous prime is 11221100121137. The next prime is 11221100121269. The reversal of 11221100121211 is 11212100112211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11221100121211 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221100121911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610550060605 + 5610550060606.

It is an arithmetic number, because the mean of its divisors is an integer number (5610550060606).

Almost surely, 2^{11221100121211} is an apocalyptic number.

11221100121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221100121211 is an equidigital number, since it uses as much as digits as its factorization.

11221100121211 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 16.

Adding to 11221100121211 its reverse (11212100112211), we get a palindrome (22433200233422).

The spelling of 11221100121211 in words is "eleven trillion, two hundred twenty-one billion, one hundred million, one hundred twenty-one thousand, two hundred eleven".