221120012 has 24 divisors (see below), whose sum is σ = 400910160. Its totient is φ = 106585920.

The previous prime is 221119991. The next prime is 221120017. The reversal of 221120012 is 210021122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221119975 and 221120002.

It is not an unprimeable number, because it can be changed into a prime (221120017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117503 + ... + 119369.

It is an arithmetic number, because the mean of its divisors is an integer number (16704590).

Almost surely, 2^221120012 is an apocalyptic number.

It is an amenable number.

221120012 is a deficient number, since it is larger than the sum of its proper divisors (179790148).

221120012 is a wasteful number, since it uses less digits than its factorization.

221120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921 (or 2919 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 221120012 is about 14870.1046398470. The cubic root of 221120012 is about 604.7037795834.

Adding to 221120012 its reverse (210021122), we get a palindrome (431141134).

The spelling of 221120012 in words is "two hundred twenty-one million, one hundred twenty thousand, twelve".