121568273939 has 8 divisors (see below), whose sum is σ = 139547221248. Its totient is φ = 103742339400.

The previous prime is 121568273807. The next prime is 121568273947. The reversal of 121568273939 is 939372865121.

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

It is a de Polignac number, because none of the positive numbers 2^k-121568273939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121568273039) 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, 38251487 + ... + 38254664.

It is an arithmetic number, because the mean of its divisors is an integer number (17443402656).

Almost surely, 2^121568273939 is an apocalyptic number.

121568273939 is a deficient number, since it is larger than the sum of its proper divisors (17978947309).

121568273939 is an equidigital number, since it uses as much as digits as its factorization.

121568273939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76506385.

The product of its digits is 4898880, while the sum is 56.

The spelling of 121568273939 in words is "one hundred twenty-one billion, five hundred sixty-eight million, two hundred seventy-three thousand, nine hundred thirty-nine".