12120021210121 has 32 divisors (see below), whose sum is σ = 13391578368000. Its totient is φ = 10877714738880.

The previous prime is 12120021210109. The next prime is 12120021210181. The reversal of 12120021210121 is 12101212002121.

It is not a de Polignac number, because 12120021210121 - 2⁷ = 12120021209993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120021210095 and 12120021210104.

It is not an unprimeable number, because it can be changed into a prime (12120021210181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 665085616 + ... + 665103838.

It is an arithmetic number, because the mean of its divisors is an integer number (418486824000).

Almost surely, 2^{12120021210121} is an apocalyptic number.

12120021210121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12120021210121 is a deficient number, since it is larger than the sum of its proper divisors (1271557157879).

12120021210121 is a wasteful number, since it uses less digits than its factorization.

12120021210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20829.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12120021210121 its reverse (12101212002121), we get a palindrome (24221233212242).

The spelling of 12120021210121 in words is "twelve trillion, one hundred twenty billion, twenty-one million, two hundred ten thousand, one hundred twenty-one".