121608128543 has 8 divisors (see below), whose sum is σ = 132980037120. Its totient is φ = 110288990680.

The previous prime is 121608128531. The next prime is 121608128611. The reversal of 121608128543 is 345821806121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121608128543 - 2⁴ = 121608128527 is a prime.

It is a super-2 number, since 2×121608128543² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121608128543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121608128743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13187855 + ... + 13197072.

It is an arithmetic number, because the mean of its divisors is an integer number (16622504640).

Almost surely, 2^121608128543 is an apocalyptic number.

121608128543 is a deficient number, since it is larger than the sum of its proper divisors (11371908577).

121608128543 is a wasteful number, since it uses less digits than its factorization.

121608128543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26385357.

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 121608128543 in words is "one hundred twenty-one billion, six hundred eight million, one hundred twenty-eight thousand, five hundred forty-three".