121001281543 has 2 divisors, whose sum is σ = 121001281544. Its totient is φ = 121001281542.

The previous prime is 121001281523. The next prime is 121001281547. The reversal of 121001281543 is 345182100121.

It is a strong prime.

It is an emirp because it is prime and its reverse (345182100121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121001281543 - 2³³ = 112411346951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121001281547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500640771 + 60500640772.

It is an arithmetic number, because the mean of its divisors is an integer number (60500640772).

Almost surely, 2^121001281543 is an apocalyptic number.

121001281543 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001281543 is an equidigital number, since it uses as much as digits as its factorization.

121001281543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 121001281543 its reverse (345182100121), we get a palindrome (466183381664).

The spelling of 121001281543 in words is "one hundred twenty-one billion, one million, two hundred eighty-one thousand, five hundred forty-three".