121533142343 has 2 divisors, whose sum is σ = 121533142344. Its totient is φ = 121533142342.

The previous prime is 121533142279. The next prime is 121533142397. The reversal of 121533142343 is 343241335121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121533142343 - 2⁶ = 121533142279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121533142243) 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, 60766571171 + 60766571172.

It is an arithmetic number, because the mean of its divisors is an integer number (60766571172).

Almost surely, 2^121533142343 is an apocalyptic number.

121533142343 is a deficient number, since it is larger than the sum of its proper divisors (1).

121533142343 is an equidigital number, since it uses as much as digits as its factorization.

121533142343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 32.

Adding to 121533142343 its reverse (343241335121), we get a palindrome (464774477464).

The spelling of 121533142343 in words is "one hundred twenty-one billion, five hundred thirty-three million, one hundred forty-two thousand, three hundred forty-three".