212022222220221 has 16 divisors (see below), whose sum is σ = 323525885190144. Its totient is φ = 120988904162544.

The previous prime is 212022222220129. The next prime is 212022222220309. The reversal of 212022222220221 is 122022222220212.

It is not a de Polignac number, because 212022222220221 - 2⁴² = 207624175709117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212022222220191 and 212022222220200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212022222224221) 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, 6943792365 + ... + 6943822898.

It is an arithmetic number, because the mean of its divisors is an integer number (20220367824384).

Almost surely, 2^{212022222220221} is an apocalyptic number.

212022222220221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212022222220221 is a deficient number, since it is larger than the sum of its proper divisors (111503662969923).

212022222220221 is a wasteful number, since it uses less digits than its factorization.

212022222220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13887616000.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 212022222220221 its reverse (122022222220212), we get a palindrome (334044444440433).

Subtracting from 212022222220221 its reverse (122022222220212), we obtain a palindrome (90000000000009).

The spelling of 212022222220221 in words is "two hundred twelve trillion, twenty-two billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".