12120002112121 has 16 divisors (see below), whose sum is σ = 12952731371904. Its totient is φ = 11301048624384.

The previous prime is 12120002112107. The next prime is 12120002112143. The reversal of 12120002112121 is 12121120002121.

It is a cyclic number.

It is not a de Polignac number, because 12120002112121 - 2¹⁷ = 12120001981049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120002112095 and 12120002112104.

It is not an unprimeable number, because it can be changed into a prime (12120002110121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6448701 + ... + 8113306.

It is an arithmetic number, because the mean of its divisors is an integer number (809545710744).

Almost surely, 2^{12120002112121} is an apocalyptic number.

It is an amenable number.

12120002112121 is a deficient number, since it is larger than the sum of its proper divisors (832729259783).

12120002112121 is a wasteful number, since it uses less digits than its factorization.

12120002112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14562480.

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

Adding to 12120002112121 its reverse (12121120002121), we get a palindrome (24241122114242).

The spelling of 12120002112121 in words is "twelve trillion, one hundred twenty billion, two million, one hundred twelve thousand, one hundred twenty-one".