212221131331 has 8 divisors (see below), whose sum is σ = 233179531200. Its totient is φ = 191540326440.

The previous prime is 212221131329. The next prime is 212221131359. The reversal of 212221131331 is 133131122212.

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

It is not a de Polignac number, because 212221131331 - 2¹ = 212221131329 is a prime.

It is a super-2 number, since 2×212221131331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212221131431) 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, 69397141 + ... + 69400198.

It is an arithmetic number, because the mean of its divisors is an integer number (29147441400).

Almost surely, 2^212221131331 is an apocalyptic number.

212221131331 is a deficient number, since it is larger than the sum of its proper divisors (20958399869).

212221131331 is a wasteful number, since it uses less digits than its factorization.

212221131331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138797489.

The product of its digits is 432, while the sum is 22.

Adding to 212221131331 its reverse (133131122212), we get a palindrome (345352253543).

The spelling of 212221131331 in words is "two hundred twelve billion, two hundred twenty-one million, one hundred thirty-one thousand, three hundred thirty-one".