8421012123 has 8 divisors (see below), whose sum is σ = 11243635200. Its totient is φ = 5606198568.

The previous prime is 8421012109. The next prime is 8421012157. The reversal of 8421012123 is 3212101248.

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

It is not a de Polignac number, because 8421012123 - 2¹⁰ = 8421011099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8421012093 and 8421012102.

It is not an unprimeable number, because it can be changed into a prime (8421012923) 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, 1949863 + ... + 1954176.

It is an arithmetic number, because the mean of its divisors is an integer number (1405454400).

Almost surely, 2^8421012123 is an apocalyptic number.

8421012123 is a deficient number, since it is larger than the sum of its proper divisors (2822623077).

8421012123 is a wasteful number, since it uses less digits than its factorization.

8421012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904761.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 8421012123 is about 91766.0728319568. The cubic root of 8421012123 is about 2034.4862741451.

The spelling of 8421012123 in words is "eight billion, four hundred twenty-one million, twelve thousand, one hundred twenty-three".