212221441 has 8 divisors (see below), whose sum is σ = 214239168. Its totient is φ = 210210000.

The previous prime is 212221433. The next prime is 212221459. The reversal of 212221441 is 144122212.

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 212221441 - 2³ = 212221433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221411) 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, 90676 + ... + 92986.

It is an arithmetic number, because the mean of its divisors is an integer number (26779896).

Almost surely, 2^212221441 is an apocalyptic number.

It is an amenable number.

212221441 is a deficient number, since it is larger than the sum of its proper divisors (2017727).

212221441 is a wasteful number, since it uses less digits than its factorization.

212221441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143.

The product of its digits is 256, while the sum is 19.

The square root of 212221441 is about 14567.8221090182. The cubic root of 212221441 is about 596.4807325452.

Adding to 212221441 its reverse (144122212), we get a palindrome (356343653).

The spelling of 212221441 in words is "two hundred twelve million, two hundred twenty-one thousand, four hundred forty-one".