8129010921 has 8 divisors (see below), whose sum is σ = 11476250784. Its totient is φ = 5100555840.

The previous prime is 8129010893. The next prime is 8129010931. The reversal of 8129010921 is 1290109218.

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

It is not a de Polignac number, because 8129010921 - 2¹⁰ = 8129009897 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (8129010931) 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, 79696135 + ... + 79696236.

It is an arithmetic number, because the mean of its divisors is an integer number (1434531348).

Almost surely, 2^8129010921 is an apocalyptic number.

It is an amenable number.

8129010921 is a deficient number, since it is larger than the sum of its proper divisors (3347239863).

8129010921 is a wasteful number, since it uses less digits than its factorization.

8129010921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159392391.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 8129010921 is about 90161.0277281709. The cubic root of 8129010921 is about 2010.6936313034.

The spelling of 8129010921 in words is "eight billion, one hundred twenty-nine million, ten thousand, nine hundred twenty-one".