212331221332 has 6 divisors (see below), whose sum is σ = 371579637338. Its totient is φ = 106165610664.

The previous prime is 212331221329. The next prime is 212331221351. The reversal of 212331221332 is 233122133212.

It can be written as a sum of positive squares in only one way, i.e., 210436882756 + 1894338576 = 458734^2 + 43524^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212331221297 and 212331221306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26541402663 + ... + 26541402670.

Almost surely, 2^212331221332 is an apocalyptic number.

It is an amenable number.

212331221332 is a deficient number, since it is larger than the sum of its proper divisors (159248416006).

212331221332 is a wasteful number, since it uses less digits than its factorization.

212331221332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53082805337 (or 53082805335 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

Adding to 212331221332 its reverse (233122133212), we get a palindrome (445453354544).

The spelling of 212331221332 in words is "two hundred twelve billion, three hundred thirty-one million, two hundred twenty-one thousand, three hundred thirty-two".