212120112021 has 8 divisors (see below), whose sum is σ = 282855334944. Its totient is φ = 141399148560.

The previous prime is 212120112019. The next prime is 212120112047. The reversal of 212120112021 is 120211021212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212120112021 - 2¹ = 212120112019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120112121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3530106 + ... + 3589691.

It is an arithmetic number, because the mean of its divisors is an integer number (35356916868).

Almost surely, 2^212120112021 is an apocalyptic number.

It is an amenable number.

212120112021 is a deficient number, since it is larger than the sum of its proper divisors (70735222923).

212120112021 is an equidigital number, since it uses as much as digits as its factorization.

212120112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7129731.

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

Adding to 212120112021 its reverse (120211021212), we get a palindrome (332331133233).

The spelling of 212120112021 in words is "two hundred twelve billion, one hundred twenty million, one hundred twelve thousand, twenty-one".