221121246 has 8 divisors (see below), whose sum is σ = 442242504. Its totient is φ = 73707080.

The previous prime is 221121223. The next prime is 221121253. The reversal of 221121246 is 642121122.

It is a sphenic number, since it is the product of 3 distinct primes.

221121246 is an admirable number.

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, 18426765 + ... + 18426776.

It is an arithmetic number, because the mean of its divisors is an integer number (55280313).

Almost surely, 2^221121246 is an apocalyptic number.

221121246 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221121246 is a wasteful number, since it uses less digits than its factorization.

221121246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36853546.

The product of its digits is 384, while the sum is 21.

The square root of 221121246 is about 14870.1461324360. The cubic root of 221121246 is about 604.7049044674.

Adding to 221121246 its reverse (642121122), we get a palindrome (863242368).

The spelling of 221121246 in words is "two hundred twenty-one million, one hundred twenty-one thousand, two hundred forty-six".