221122012 has 6 divisors (see below), whose sum is σ = 386963528. Its totient is φ = 110561004.

The previous prime is 221122003. The next prime is 221122049. The reversal of 221122012 is 210221122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221121983 and 221122001.

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, 27640248 + ... + 27640255.

Almost surely, 2^221122012 is an apocalyptic number.

It is an amenable number.

221122012 is a deficient number, since it is larger than the sum of its proper divisors (165841516).

221122012 is a wasteful number, since it uses less digits than its factorization.

221122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55280507 (or 55280505 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 221122012 is about 14870.1718887174. The cubic root of 221122012 is about 604.7056027320.

Adding to 221122012 its reverse (210221122), we get a palindrome (431343134).

The spelling of 221122012 in words is "two hundred twenty-one million, one hundred twenty-two thousand, twelve".