12404142121 has 16 divisors (see below), whose sum is σ = 14928249600. Its totient is φ = 10076539968.

The previous prime is 12404142067. The next prime is 12404142139. The reversal of 12404142121 is 12124140421.

It is a cyclic number.

It is not a de Polignac number, because 12404142121 - 2⁷ = 12404141993 is a prime.

It is a super-4 number, since 4×12404142121⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12404142092 and 12404142101.

It is not an unprimeable number, because it can be changed into a prime (12404142721) 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, 335866 + ... + 370963.

It is an arithmetic number, because the mean of its divisors is an integer number (933015600).

Almost surely, 2^12404142121 is an apocalyptic number.

It is an amenable number.

12404142121 is a deficient number, since it is larger than the sum of its proper divisors (2524107479).

12404142121 is a wasteful number, since it uses less digits than its factorization.

12404142121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706968.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 12404142121 its reverse (12124140421), we get a palindrome (24528282542).

The spelling of 12404142121 in words is "twelve billion, four hundred four million, one hundred forty-two thousand, one hundred twenty-one".