11101200202121 has 2 divisors, whose sum is σ = 11101200202122. Its totient is φ = 11101200202120.

The previous prime is 11101200202097. The next prime is 11101200202153. The reversal of 11101200202121 is 12120200210111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10124392153225 + 976808048896 = 3181885^2 + 988336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11101200202121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11101200202096 and 11101200202105.

It is not a weakly prime, because it can be changed into another prime (11101200202721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550600101060 + 5550600101061.

It is an arithmetic number, because the mean of its divisors is an integer number (5550600101061).

Almost surely, 2^{11101200202121} is an apocalyptic number.

It is an amenable number.

11101200202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101200202121 is an equidigital number, since it uses as much as digits as its factorization.

11101200202121 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 11101200202121 its reverse (12120200210111), we get a palindrome (23221400412232).

The spelling of 11101200202121 in words is "eleven trillion, one hundred one billion, two hundred million, two hundred two thousand, one hundred twenty-one".