121112543 has 2 divisors, whose sum is σ = 121112544. Its totient is φ = 121112542.

The previous prime is 121112531. The next prime is 121112587. The reversal of 121112543 is 345211121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121112543 - 2⁸ = 121112287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124112543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60556271 + 60556272.

It is an arithmetic number, because the mean of its divisors is an integer number (60556272).

Almost surely, 2^121112543 is an apocalyptic number.

121112543 is a deficient number, since it is larger than the sum of its proper divisors (1).

121112543 is an equidigital number, since it uses as much as digits as its factorization.

121112543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 20.

The square root of 121112543 is about 11005.1144019497. The cubic root of 121112543 is about 494.7620432305.

Adding to 121112543 its reverse (345211121), we get a palindrome (466323664).

The spelling of 121112543 in words is "one hundred twenty-one million, one hundred twelve thousand, five hundred forty-three".