12078121 has 8 divisors (see below), whose sum is σ = 13201344. Its totient is φ = 10959120.

The previous prime is 12078103. The next prime is 12078139. The reversal of 12078121 is 12187021.

It is an interprime number because it is at equal distance from previous prime (12078103) and next prime (12078139).

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

It is a cyclic number.

It is not a de Polignac number, because 12078121 - 2⁷ = 12077993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12078092 and 12078101.

It is not an unprimeable number, because it can be changed into a prime (12078161) 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, 10255 + ... + 11371.

It is an arithmetic number, because the mean of its divisors is an integer number (1650168).

Almost surely, 2^12078121 is an apocalyptic number.

12078121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12078121 is a deficient number, since it is larger than the sum of its proper divisors (1123223).

12078121 is a wasteful number, since it uses less digits than its factorization.

12078121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 12078121 is about 3475.3591181344. The cubic root of 12078121 is about 229.4385866372.

Subtracting 12078121 from its reverse (12187021), we obtain a square (108900 = 330²).

The spelling of 12078121 in words is "twelve million, seventy-eight thousand, one hundred twenty-one".