120212112121 has 16 divisors (see below), whose sum is σ = 129639787200. Its totient is φ = 111064555008.

The previous prime is 120212112089. The next prime is 120212112157. The reversal of 120212112121 is 121211212021.

It is a cyclic number.

It is not a de Polignac number, because 120212112121 - 2⁵ = 120212112089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120212112095 and 120212112104.

It is not an unprimeable number, because it can be changed into a prime (120212112421) 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, 75495 + ... + 496108.

It is an arithmetic number, because the mean of its divisors is an integer number (8102486700).

Almost surely, 2^120212112121 is an apocalyptic number.

It is an amenable number.

120212112121 is a deficient number, since it is larger than the sum of its proper divisors (9427675079).

120212112121 is a wasteful number, since it uses less digits than its factorization.

120212112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571848.

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

Adding to 120212112121 its reverse (121211212021), we get a palindrome (241423324142).

The spelling of 120212112121 in words is "one hundred twenty billion, two hundred twelve million, one hundred twelve thousand, one hundred twenty-one".