221312400303 has 8 divisors (see below), whose sum is σ = 295114329216. Its totient is φ = 147526035800.

The previous prime is 221312400299. The next prime is 221312400307. The reversal of 221312400303 is 303004213122.

It is an interprime number because it is at equal distance from previous prime (221312400299) and next prime (221312400307).

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 221312400303 - 2² = 221312400299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221312400303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221312400307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3857883 + ... + 3914828.

It is an arithmetic number, because the mean of its divisors is an integer number (36889291152).

Almost surely, 2^221312400303 is an apocalyptic number.

221312400303 is a deficient number, since it is larger than the sum of its proper divisors (73801928913).

221312400303 is an equidigital number, since it uses as much as digits as its factorization.

221312400303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7782205.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 221312400303 its reverse (303004213122), we get a palindrome (524316613425).

The spelling of 221312400303 in words is "two hundred twenty-one billion, three hundred twelve million, four hundred thousand, three hundred three".