8042123121 has 16 divisors (see below), whose sum is σ = 11245286400. Its totient is φ = 5102531280.

The previous prime is 8042123119. The next prime is 8042123147. The reversal of 8042123121 is 1213212408.

It is not a de Polignac number, because 8042123121 - 2¹ = 8042123119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8042123091 and 8042123100.

It is not an unprimeable number, because it can be changed into a prime (8042123191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279115 + ... + 306576.

It is an arithmetic number, because the mean of its divisors is an integer number (702830400).

Almost surely, 2^8042123121 is an apocalyptic number.

It is an amenable number.

8042123121 is a deficient number, since it is larger than the sum of its proper divisors (3203163279).

8042123121 is a wasteful number, since it uses less digits than its factorization.

8042123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585916.

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

The square root of 8042123121 is about 89677.8853508489. The cubic root of 8042123121 is about 2003.5041170795.

Adding to 8042123121 its reverse (1213212408), we get a palindrome (9255335529).

The spelling of 8042123121 in words is "eight billion, forty-two million, one hundred twenty-three thousand, one hundred twenty-one".