212120101110121 has 16 divisors (see below), whose sum is σ = 215767867518720. Its totient is φ = 208474092202320.

The previous prime is 212120101110107. The next prime is 212120101110163. The reversal of 212120101110121 is 121011101021212.

It is a cyclic number.

It is not a de Polignac number, because 212120101110121 - 2⁷ = 212120101109993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212120101110095 and 212120101110104.

It is not an unprimeable number, because it can be changed into a prime (212120101150121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4887200406 + ... + 4887243808.

It is an arithmetic number, because the mean of its divisors is an integer number (13485491719920).

Almost surely, 2^{212120101110121} is an apocalyptic number.

It is an amenable number.

212120101110121 is a deficient number, since it is larger than the sum of its proper divisors (3647766408599).

212120101110121 is an equidigital number, since it uses as much as digits as its factorization.

212120101110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61716.

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

Adding to 212120101110121 its reverse (121011101021212), we get a palindrome (333131202131333).

The spelling of 212120101110121 in words is "two hundred twelve trillion, one hundred twenty billion, one hundred one million, one hundred ten thousand, one hundred twenty-one".