11221202211211 has 2 divisors, whose sum is σ = 11221202211212. Its totient is φ = 11221202211210.

The previous prime is 11221202211137. The next prime is 11221202211223. The reversal of 11221202211211 is 11211220212211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11221202211211 - 2¹⁹ = 11221201686923 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221202211281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610601105605 + 5610601105606.

It is an arithmetic number, because the mean of its divisors is an integer number (5610601105606).

Almost surely, 2^{11221202211211} is an apocalyptic number.

11221202211211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221202211211 is an equidigital number, since it uses as much as digits as its factorization.

11221202211211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11221202211211 its reverse (11211220212211), we get a palindrome (22432422423422).

The spelling of 11221202211211 in words is "eleven trillion, two hundred twenty-one billion, two hundred two million, two hundred eleven thousand, two hundred eleven".