12120807121 has 8 divisors (see below), whose sum is σ = 12173990400. Its totient is φ = 12067740960.

The previous prime is 12120807119. The next prime is 12120807133. The reversal of 12120807121 is 12170802121.

It is a happy number.

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 12120807121 - 2¹ = 12120807119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120802121) 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, 181461 + ... + 239101.

It is an arithmetic number, because the mean of its divisors is an integer number (1521748800).

Almost surely, 2^12120807121 is an apocalyptic number.

It is an amenable number.

12120807121 is a deficient number, since it is larger than the sum of its proper divisors (53183279).

12120807121 is an equidigital number, since it uses as much as digits as its factorization.

12120807121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58559.

The product of its (nonzero) digits is 448, while the sum is 25.

Subtracting 12120807121 from its reverse (12170802121), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 12120807121 in words is "twelve billion, one hundred twenty million, eight hundred seven thousand, one hundred twenty-one".