212221321231 has 8 divisors (see below), whose sum is σ = 214300929024. Its totient is φ = 210142083000.

The previous prime is 212221321223. The next prime is 212221321253. The reversal of 212221321231 is 132123122212.

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 212221321231 - 2³ = 212221321223 is a prime.

It is a super-2 number, since 2×212221321231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221321531) 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, 1142106 + ... + 1314856.

It is an arithmetic number, because the mean of its divisors is an integer number (26787616128).

Almost surely, 2^212221321231 is an apocalyptic number.

212221321231 is a deficient number, since it is larger than the sum of its proper divisors (2079607793).

212221321231 is a wasteful number, since it uses less digits than its factorization.

212221321231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184781.

The product of its digits is 576, while the sum is 22.

Adding to 212221321231 its reverse (132123122212), we get a palindrome (344344443443).

The spelling of 212221321231 in words is "two hundred twelve billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred thirty-one".