111212131423241 has 2 divisors, whose sum is σ = 111212131423242. Its totient is φ = 111212131423240.

The previous prime is 111212131423213. The next prime is 111212131423277. The reversal of 111212131423241 is 142324131212111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103291447297600 + 7920684125641 = 10163240^2 + 2814371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111212131423241 is a prime.

It is a super-3 number, since 3×111212131423241³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (111212131423201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606065711620 + 55606065711621.

It is an arithmetic number, because the mean of its divisors is an integer number (55606065711621).

Almost surely, 2^{111212131423241} is an apocalyptic number.

It is an amenable number.

111212131423241 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212131423241 is an equidigital number, since it uses as much as digits as its factorization.

111212131423241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 29.

Adding to 111212131423241 its reverse (142324131212111), we get a palindrome (253536262635352).

The spelling of 111212131423241 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred thirty-one million, four hundred twenty-three thousand, two hundred forty-one".