212201021021 has 8 divisors (see below), whose sum is σ = 231709808064. Its totient is φ = 192728531520.

The previous prime is 212201021009. The next prime is 212201021033. The reversal of 212201021021 is 120120102212.

212201021021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212201021009) and next prime (212201021033).

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 212201021021 - 2⁶ = 212201020957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212201020987 and 212201021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201021621) 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, 9062156 + ... + 9085541.

It is an arithmetic number, because the mean of its divisors is an integer number (28963726008).

Almost surely, 2^212201021021 is an apocalyptic number.

It is an amenable number.

212201021021 is a deficient number, since it is larger than the sum of its proper divisors (19508787043).

212201021021 is a wasteful number, since it uses less digits than its factorization.

212201021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18148771.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212201021021 its reverse (120120102212), we get a palindrome (332321123233).

The spelling of 212201021021 in words is "two hundred twelve billion, two hundred one million, twenty-one thousand, twenty-one".