212221232330 has 16 divisors (see below), whose sum is σ = 384786528840. Its totient is φ = 84268868352.

The previous prime is 212221232303. The next prime is 212221232411. The reversal of 212221232330 is 33232122212.

It can be written as a sum of positive squares in 4 ways, for example, as 105163355521 + 107057876809 = 324289^2 + 327197^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212221232296 and 212221232305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77451635 + ... + 77454374.

Almost surely, 2^212221232330 is an apocalyptic number.

212221232330 is a deficient number, since it is larger than the sum of its proper divisors (172565296510).

212221232330 is a wasteful number, since it uses less digits than its factorization.

212221232330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154906153.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 212221232330 its reverse (33232122212), we get a palindrome (245453354542).

The spelling of 212221232330 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred thirty-two thousand, three hundred thirty".