11202121211 has 2 divisors, whose sum is σ = 11202121212. Its totient is φ = 11202121210.

The previous prime is 11202121201. The next prime is 11202121223. The reversal of 11202121211 is 11212120211.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11202121211 is a prime.

It is a super-2 number, since 2×11202121211² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11202121201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5601060605 + 5601060606.

It is an arithmetic number, because the mean of its divisors is an integer number (5601060606).

Almost surely, 2^11202121211 is an apocalyptic number.

11202121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11202121211 is an equidigital number, since it uses as much as digits as its factorization.

11202121211 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 11202121211 its reverse (11212120211), we get a palindrome (22414241422).

The spelling of 11202121211 in words is "eleven billion, two hundred two million, one hundred twenty-one thousand, two hundred eleven".