221012120303 has 8 divisors (see below), whose sum is σ = 252013820688. Its totient is φ = 192010529664.

The previous prime is 221012120291. The next prime is 221012120309. The reversal of 221012120303 is 303021210122.

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

It is a cyclic number.

It is not a de Polignac number, because 221012120303 - 2⁸ = 221012120047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012120309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500027201 + ... + 500027642.

It is an arithmetic number, because the mean of its divisors is an integer number (31501727586).

Almost surely, 2^221012120303 is an apocalyptic number.

221012120303 is a deficient number, since it is larger than the sum of its proper divisors (31001700385).

221012120303 is a wasteful number, since it uses less digits than its factorization.

221012120303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000054873.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221012120303 its reverse (303021210122), we get a palindrome (524033330425).

The spelling of 221012120303 in words is "two hundred twenty-one billion, twelve million, one hundred twenty thousand, three hundred three".