221003212 has 24 divisors (see below), whose sum is σ = 415779840. Its totient is φ = 102456720.

The previous prime is 221003197. The next prime is 221003227. The reversal of 221003212 is 212300122.

It is an interprime number because it is at equal distance from previous prime (221003197) and next prime (221003227).

It is a junction number, because it is equal to n+sod(n) for n = 221003192 and 221003201.

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, 27364 + ... + 34507.

It is an arithmetic number, because the mean of its divisors is an integer number (17324160).

Almost surely, 2^221003212 is an apocalyptic number.

It is an amenable number.

221003212 is a deficient number, since it is larger than the sum of its proper divisors (194776628).

221003212 is a wasteful number, since it uses less digits than its factorization.

221003212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61941 (or 61939 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221003212 is about 14866.1767781767. The cubic root of 221003212 is about 604.5972886324.

Adding to 221003212 its reverse (212300122), we get a palindrome (433303334).

The spelling of 221003212 in words is "two hundred twenty-one million, three thousand, two hundred twelve".