121402514543 has 16 divisors (see below), whose sum is σ = 124024174560. Its totient is φ = 118806500736.

The previous prime is 121402514507. The next prime is 121402514549. The reversal of 121402514543 is 345415204121.

It is a cyclic number.

It is not a de Polignac number, because 121402514543 - 2²⁴ = 121385737327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121402514549) 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 in 15 ways as a sum of consecutive naturals, for example, 9351605 + ... + 9364577.

It is an arithmetic number, because the mean of its divisors is an integer number (7751510910).

Almost surely, 2^121402514543 is an apocalyptic number.

121402514543 is a deficient number, since it is larger than the sum of its proper divisors (2621660017).

121402514543 is a wasteful number, since it uses less digits than its factorization.

121402514543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13946.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 121402514543 its reverse (345415204121), we get a palindrome (466817718664).

The spelling of 121402514543 in words is "one hundred twenty-one billion, four hundred two million, five hundred fourteen thousand, five hundred forty-three".