212101211021 has 8 divisors (see below), whose sum is σ = 242405824320. Its totient is φ = 181797707808.

The previous prime is 212101210999. The next prime is 212101211099. The reversal of 212101211021 is 120112101212.

212101211021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 212101211021 - 2³⁴ = 194921341837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212101210987 and 212101211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212101211221) 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 7 ways as a sum of consecutive naturals, for example, 182825 + ... + 676481.

It is an arithmetic number, because the mean of its divisors is an integer number (30300728040).

Almost surely, 2^212101211021 is an apocalyptic number.

It is an amenable number.

212101211021 is a deficient number, since it is larger than the sum of its proper divisors (30304613299).

212101211021 is an equidigital number, since it uses as much as digits as its factorization.

212101211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555043.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212101211021 its reverse (120112101212), we get a palindrome (332213312233).

The spelling of 212101211021 in words is "two hundred twelve billion, one hundred one million, two hundred eleven thousand, twenty-one".