79912320121 has 8 divisors (see below), whose sum is σ = 84615957504. Its totient is φ = 75209006400.

The previous prime is 79912320101. The next prime is 79912320127. The reversal of 79912320121 is 12102321997.

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-79912320121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79912320127) 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 7 ways as a sum of consecutive naturals, for example, 583236 + ... + 707098.

It is an arithmetic number, because the mean of its divisors is an integer number (10576994688).

Almost surely, 2^79912320121 is an apocalyptic number.

It is an amenable number.

79912320121 is a deficient number, since it is larger than the sum of its proper divisors (4703637383).

79912320121 is a wasteful number, since it uses less digits than its factorization.

79912320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161831.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 79912320121 in words is "seventy-nine billion, nine hundred twelve million, three hundred twenty thousand, one hundred twenty-one".