212021203213221 has 8 divisors (see below), whose sum is σ = 282738289113984. Its totient is φ = 141325793060640.

The previous prime is 212021203213213. The next prime is 212021203213279. The reversal of 212021203213221 is 122312302120212.

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

It is not a de Polignac number, because 212021203213221 - 2³ = 212021203213213 is a prime.

It is a super-2 number, since 2×212021203213221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212021203213191 and 212021203213200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021203213621) 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, 5418914221 + ... + 5418953346.

It is an arithmetic number, because the mean of its divisors is an integer number (35342286139248).

Almost surely, 2^{212021203213221} is an apocalyptic number.

It is an amenable number.

212021203213221 is a deficient number, since it is larger than the sum of its proper divisors (70717085900763).

212021203213221 is a wasteful number, since it uses less digits than its factorization.

212021203213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10837874091.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 212021203213221 its reverse (122312302120212), we get a palindrome (334333505333433).

The spelling of 212021203213221 in words is "two hundred twelve trillion, twenty-one billion, two hundred three million, two hundred thirteen thousand, two hundred twenty-one".