221232212 has 12 divisors (see below), whose sum is σ = 387875796. Its totient is φ = 110410560.

The previous prime is 221232211. The next prime is 221232223. The reversal of 221232212 is 212232122.

It can be written as a sum of positive squares in 2 ways, for example, as 94984516 + 126247696 = 9746^2 + 11236^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48953 + ... + 53280.

It is an arithmetic number, because the mean of its divisors is an integer number (32322983).

Almost surely, 2^221232212 is an apocalyptic number.

It is an amenable number.

221232212 is a deficient number, since it is larger than the sum of its proper divisors (166643584).

221232212 is a wasteful number, since it uses less digits than its factorization.

221232212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102778 (or 102776 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 221232212 is about 14873.8768315460. The cubic root of 221232212 is about 604.8060412331.

Adding to 221232212 its reverse (212232122), we get a palindrome (433464334).

The spelling of 221232212 in words is "two hundred twenty-one million, two hundred thirty-two thousand, two hundred twelve".