212112120021 has 16 divisors (see below), whose sum is σ = 284234129088. Its totient is φ = 140699462400.

The previous prime is 212112119969. The next prime is 212112120041. The reversal of 212112120021 is 120021211212.

212112120021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212112120021 - 2¹³ = 212112111829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112120041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2374845 + ... + 2462541.

It is an arithmetic number, because the mean of its divisors is an integer number (17764633068).

Almost surely, 2^212112120021 is an apocalyptic number.

It is an amenable number.

212112120021 is a deficient number, since it is larger than the sum of its proper divisors (72122009067).

212112120021 is a wasteful number, since it uses less digits than its factorization.

212112120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91732.

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

Adding to 212112120021 its reverse (120021211212), we get a palindrome (332133331233).

The spelling of 212112120021 in words is "two hundred twelve billion, one hundred twelve million, one hundred twenty thousand, twenty-one".