11121121201 has 2 divisors, whose sum is σ = 11121121202. Its totient is φ = 11121121200.

The previous prime is 11121121199. The next prime is 11121121237. The reversal of 11121121201 is 10212112111.

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., 5894554176 + 5226567025 = 76776^2 + 72295^2 .

It is an emirp because it is prime and its reverse (10212112111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11121121201 - 2¹ = 11121121199 is a prime.

Together with 11121121199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11121121241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560560600 + 5560560601.

It is an arithmetic number, because the mean of its divisors is an integer number (5560560601).

Almost surely, 2^11121121201 is an apocalyptic number.

It is an amenable number.

11121121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121121201 is an equidigital number, since it uses as much as digits as its factorization.

11121121201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11121121201 its reverse (10212112111), we get a palindrome (21333233312).

The spelling of 11121121201 in words is "eleven billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred one".