79122111281 has 8 divisors (see below), whose sum is σ = 79409925504. Its totient is φ = 78834611520.

The previous prime is 79122111253. The next prime is 79122111311. The reversal of 79122111281 is 18211122197.

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

It is a cyclic number.

It is not a de Polignac number, because 79122111281 - 2¹⁰ = 79122110257 is a prime.

It is a super-2 number, since 2×79122111281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79122111581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431516 + ... + 586898.

It is an arithmetic number, because the mean of its divisors is an integer number (9926240688).

Almost surely, 2^79122111281 is an apocalyptic number.

It is an amenable number.

79122111281 is a deficient number, since it is larger than the sum of its proper divisors (287814223).

79122111281 is a wasteful number, since it uses less digits than its factorization.

79122111281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157231.

The product of its digits is 4032, while the sum is 35.

The spelling of 79122111281 in words is "seventy-nine billion, one hundred twenty-two million, one hundred eleven thousand, two hundred eighty-one".