11212002018121 has 2 divisors, whose sum is σ = 11212002018122. Its totient is φ = 11212002018120.

The previous prime is 11212002018083. The next prime is 11212002018169. The reversal of 11212002018121 is 12181020021211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10336617233721 + 875384784400 = 3215061^2 + 935620^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212002018121 - 2²¹ = 11211999920969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11212002018092 and 11212002018101.

It is not a weakly prime, because it can be changed into another prime (11212002018181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606001009060 + 5606001009061.

It is an arithmetic number, because the mean of its divisors is an integer number (5606001009061).

Almost surely, 2^{11212002018121} is an apocalyptic number.

It is an amenable number.

11212002018121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212002018121 is an equidigital number, since it uses as much as digits as its factorization.

11212002018121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 11212002018121 its reverse (12181020021211), we get a palindrome (23393022039332).

The spelling of 11212002018121 in words is "eleven trillion, two hundred twelve billion, two million, eighteen thousand, one hundred twenty-one".