8122121279 has 8 divisors (see below), whose sum is σ = 8321894448. Its totient is φ = 7922427840.

The previous prime is 8122121257. The next prime is 8122121281. The reversal of 8122121279 is 9721212218.

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 8122121279 - 2⁸ = 8122121023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8122121239) 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, 221909 + ... + 255905.

It is an arithmetic number, because the mean of its divisors is an integer number (1040236806).

Almost surely, 2^8122121279 is an apocalyptic number.

8122121279 is a deficient number, since it is larger than the sum of its proper divisors (199773169).

8122121279 is a wasteful number, since it uses less digits than its factorization.

8122121279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39865.

The product of its digits is 8064, while the sum is 35.

The square root of 8122121279 is about 90122.8122009073. The cubic root of 8122121279 is about 2010.1254246296.

The spelling of 8122121279 in words is "eight billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred seventy-nine".