12120020102121 has 24 divisors (see below), whose sum is σ = 16699776387840. Its totient is φ = 7818598640160.

The previous prime is 12120020102117. The next prime is 12120020102129. The reversal of 12120020102121 is 12120102002121.

It is not a de Polignac number, because 12120020102121 - 2² = 12120020102117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12120020102121.

It is not an unprimeable number, because it can be changed into a prime (12120020102129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29865256 + ... + 30268358.

It is an arithmetic number, because the mean of its divisors is an integer number (695824016160).

Almost surely, 2^{12120020102121} is an apocalyptic number.

It is an amenable number.

12120020102121 is a deficient number, since it is larger than the sum of its proper divisors (4579756285719).

12120020102121 is a wasteful number, since it uses less digits than its factorization.

12120020102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413597 (or 413566 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12120020102121 its reverse (12120102002121), we get a palindrome (24240122104242).

The spelling of 12120020102121 in words is "twelve trillion, one hundred twenty billion, twenty million, one hundred two thousand, one hundred twenty-one".