12001212120121 has 12 divisors (see below), whose sum is σ = 13963069733760. Its totient is φ = 10284928793160.

The previous prime is 12001212120113. The next prime is 12001212120127. The reversal of 12001212120121 is 12102121210021.

It is not a de Polignac number, because 12001212120121 - 2³ = 12001212120113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001212120095 and 12001212120104.

It is not an unprimeable number, because it can be changed into a prime (12001212120127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21440545 + ... + 21993166.

It is an arithmetic number, because the mean of its divisors is an integer number (1163589144480).

Almost surely, 2^{12001212120121} is an apocalyptic number.

It is an amenable number.

12001212120121 is a deficient number, since it is larger than the sum of its proper divisors (1961857613639).

12001212120121 is an equidigital number, since it uses as much as digits as its factorization.

12001212120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43439364 (or 43439357 counting only the distinct ones).

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

Adding to 12001212120121 its reverse (12102121210021), we get a palindrome (24103333330142).

The spelling of 12001212120121 in words is "twelve trillion, one billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-one".