212201110212221 has 16 divisors (see below), whose sum is σ = 228978368365824. Its totient is φ = 195489089950464.

The previous prime is 212201110212137. The next prime is 212201110212233. The reversal of 212201110212221 is 122212011102212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212201110212221 is a prime.

It is a super-2 number, since 2×212201110212221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212201110212193 and 212201110212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201140212221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6230600 + ... + 21522606.

It is an arithmetic number, because the mean of its divisors is an integer number (14311148022864).

Almost surely, 2^{212201110212221} is an apocalyptic number.

It is an amenable number.

212201110212221 is a deficient number, since it is larger than the sum of its proper divisors (16777258153603).

212201110212221 is a wasteful number, since it uses less digits than its factorization.

212201110212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15294140.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212201110212221 its reverse (122212011102212), we get a palindrome (334413121314433).

The spelling of 212201110212221 in words is "two hundred twelve trillion, two hundred one billion, one hundred ten million, two hundred twelve thousand, two hundred twenty-one".