121669538243 has 8 divisors (see below), whose sum is σ = 132735668736. Its totient is φ = 110604285000.

The previous prime is 121669538239. The next prime is 121669538261. The reversal of 121669538243 is 342835966121.

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

It is not a de Polignac number, because 121669538243 - 2² = 121669538239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121669538191 and 121669538200.

It is not an unprimeable number, because it can be changed into a prime (121669538143) 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, 89618 + ... + 501368.

It is an arithmetic number, because the mean of its divisors is an integer number (16591958592).

Almost surely, 2^121669538243 is an apocalyptic number.

121669538243 is a deficient number, since it is larger than the sum of its proper divisors (11066130493).

121669538243 is a wasteful number, since it uses less digits than its factorization.

121669538243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438625.

The product of its digits is 1866240, while the sum is 50.

The spelling of 121669538243 in words is "one hundred twenty-one billion, six hundred sixty-nine million, five hundred thirty-eight thousand, two hundred forty-three".