111143401112221 has 2 divisors, whose sum is σ = 111143401112222. Its totient is φ = 111143401112220.

The previous prime is 111143401112207. The next prime is 111143401112257. The reversal of 111143401112221 is 122211104341111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109568263160196 + 1575137952025 = 10467486^2 + 1255045^2 .

It is a cyclic number.

It is not a de Polignac number, because 111143401112221 - 2³⁹ = 110593645298333 is a prime.

It is a super-2 number, since 2×111143401112221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111143401112291) 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, 55571700556110 + 55571700556111.

It is an arithmetic number, because the mean of its divisors is an integer number (55571700556111).

Almost surely, 2^{111143401112221} is an apocalyptic number.

It is an amenable number.

111143401112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111143401112221 is an equidigital number, since it uses as much as digits as its factorization.

111143401112221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 25.

Adding to 111143401112221 its reverse (122211104341111), we get a palindrome (233354505453332).

The spelling of 111143401112221 in words is "one hundred eleven trillion, one hundred forty-three billion, four hundred one million, one hundred twelve thousand, two hundred twenty-one".