111221021141 has 2 divisors, whose sum is σ = 111221021142. Its totient is φ = 111221021140.

The previous prime is 111221021137. The next prime is 111221021143. The reversal of 111221021141 is 141120122111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73457260900 + 37763760241 = 271030^2 + 194329^2 .

It is an emirp because it is prime and its reverse (141120122111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111221021141 - 2² = 111221021137 is a prime.

It is a Sophie Germain prime.

Together with 111221021143, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111221021143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610510570 + 55610510571.

It is an arithmetic number, because the mean of its divisors is an integer number (55610510571).

Almost surely, 2^111221021141 is an apocalyptic number.

It is an amenable number.

111221021141 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221021141 is an equidigital number, since it uses as much as digits as its factorization.

111221021141 is an odious number, because the sum of its binary digits is odd.

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

Adding to 111221021141 its reverse (141120122111), we get a palindrome (252341143252).

The spelling of 111221021141 in words is "one hundred eleven billion, two hundred twenty-one million, twenty-one thousand, one hundred forty-one".