212220020221 has 8 divisors (see below), whose sum is σ = 232712299584. Its totient is φ = 191927665920.

The previous prime is 212220020203. The next prime is 212220020293. The reversal of 212220020221 is 122020022212.

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 212220020221 - 2¹¹ = 212220018173 is a prime.

It is a super-3 number, since 3×212220020221³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212220020195 and 212220020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220020321) 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, 49979041 + ... + 49983286.

It is an arithmetic number, because the mean of its divisors is an integer number (29089037448).

Almost surely, 2^212220020221 is an apocalyptic number.

It is an amenable number.

212220020221 is a deficient number, since it is larger than the sum of its proper divisors (20492279363).

212220020221 is a wasteful number, since it uses less digits than its factorization.

212220020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99962531.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 212220020221 its reverse (122020022212), we get a palindrome (334240042433).

The spelling of 212220020221 in words is "two hundred twelve billion, two hundred twenty million, twenty thousand, two hundred twenty-one".