111120121201 has 2 divisors, whose sum is σ = 111120121202. Its totient is φ = 111120121200.

The previous prime is 111120121199. The next prime is 111120121207. The reversal of 111120121201 is 102121021111.

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., 80969271601 + 30150849600 = 284551^2 + 173640^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120121201 - 2¹ = 111120121199 is a prime.

Together with 111120121199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111120121207) 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, 55560060600 + 55560060601.

It is an arithmetic number, because the mean of its divisors is an integer number (55560060601).

Almost surely, 2^111120121201 is an apocalyptic number.

It is an amenable number.

111120121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120121201 is an equidigital number, since it uses as much as digits as its factorization.

111120121201 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 111120121201 its reverse (102121021111), we get a palindrome (213241142312).

The spelling of 111120121201 in words is "one hundred eleven billion, one hundred twenty million, one hundred twenty-one thousand, two hundred one".