8129121354 has 48 divisors (see below), whose sum is σ = 17712936384. Its totient is φ = 2694384000.

The previous prime is 8129121331. The next prime is 8129121383. The reversal of 8129121354 is 4531219218.

8129121354 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8129121354² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4558347 + ... + 4560129.

It is an arithmetic number, because the mean of its divisors is an integer number (369019508).

Almost surely, 2^8129121354 is an apocalyptic number.

8129121354 is an abundant number, since it is smaller than the sum of its proper divisors (9583815030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8129121354 is a wasteful number, since it uses less digits than its factorization.

8129121354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083 (or 3080 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 8129121354 is about 90161.6401470160. The cubic root of 8129121354 is about 2010.7027363850.

The spelling of 8129121354 in words is "eight billion, one hundred twenty-nine million, one hundred twenty-one thousand, three hundred fifty-four".