11112212002121 has 2 divisors, whose sum is σ = 11112212002122. Its totient is φ = 11112212002120.

The previous prime is 11112212002081. The next prime is 11112212002123. The reversal of 11112212002121 is 12120021221111.

11112212002121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9099658366096 + 2012553636025 = 3016564^2 + 1418645^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112212002121 - 2¹⁸ = 11112211739977 is a prime.

Together with 11112212002123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11112212002121.

It is not a weakly prime, because it can be changed into another prime (11112212002123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556106001060 + 5556106001061.

It is an arithmetic number, because the mean of its divisors is an integer number (5556106001061).

Almost surely, 2^{11112212002121} is an apocalyptic number.

It is an amenable number.

11112212002121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112212002121 is an equidigital number, since it uses as much as digits as its factorization.

11112212002121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11112212002121 its reverse (12120021221111), we get a palindrome (23232233223232).

The spelling of 11112212002121 in words is "eleven trillion, one hundred twelve billion, two hundred twelve million, two thousand, one hundred twenty-one".