221302012 has 12 divisors (see below), whose sum is σ = 387411976. Its totient is φ = 110612880.

The previous prime is 221302007. The next prime is 221302033. The reversal of 221302012 is 210203122.

It is a junction number, because it is equal to n+sod(n) for n = 221301983 and 221302001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6538 + ... + 22030.

Almost surely, 2^221302012 is an apocalyptic number.

It is an amenable number.

221302012 is a deficient number, since it is larger than the sum of its proper divisors (166109964).

221302012 is a wasteful number, since it uses less digits than its factorization.

221302012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19068 (or 19066 counting only the distinct ones).

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

The square root of 221302012 is about 14876.2230421569. The cubic root of 221302012 is about 604.8696411075.

Adding to 221302012 its reverse (210203122), we get a palindrome (431505134).

It can be divided in two parts, 22130 and 2012, that added together give a palindrome (24142).

The spelling of 221302012 in words is "two hundred twenty-one million, three hundred two thousand, twelve".