212221320231 has 8 divisors (see below), whose sum is σ = 284135876464. Its totient is φ = 140893822080.

The previous prime is 212221320149. The next prime is 212221320251. The reversal of 212221320231 is 132023122212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212221320231 - 2²⁷ = 212087102503 is a prime.

It is a super-2 number, since 2×212221320231² (a number of 23 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 = 212221320198 and 212221320207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221320251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146763676 + ... + 146765121.

It is an arithmetic number, because the mean of its divisors is an integer number (35516984558).

Almost surely, 2^212221320231 is an apocalyptic number.

212221320231 is a deficient number, since it is larger than the sum of its proper divisors (71914556233).

212221320231 is a wasteful number, since it uses less digits than its factorization.

212221320231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293529041.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 212221320231 its reverse (132023122212), we get a palindrome (344244442443).

The spelling of 212221320231 in words is "two hundred twelve billion, two hundred twenty-one million, three hundred twenty thousand, two hundred thirty-one".