212021112021 has 8 divisors (see below), whose sum is σ = 282773729280. Its totient is φ = 141307951392.

The previous prime is 212021112019. The next prime is 212021112047. The reversal of 212021112021 is 120211120212.

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

It is not a de Polignac number, because 212021112021 - 2¹ = 212021112019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021112071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9851616 + ... + 9873113.

It is an arithmetic number, because the mean of its divisors is an integer number (35346716160).

Almost surely, 2^212021112021 is an apocalyptic number.

It is an amenable number.

212021112021 is a deficient number, since it is larger than the sum of its proper divisors (70752617259).

212021112021 is a wasteful number, since it uses less digits than its factorization.

212021112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19728315.

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

Adding to 212021112021 its reverse (120211120212), we get a palindrome (332232232233).

It can be divided in two parts, 2 and 12021112021, that multiplied together give a palindrome (24042224042).

The spelling of 212021112021 in words is "two hundred twelve billion, twenty-one million, one hundred twelve thousand, twenty-one".