221244131403 has 32 divisors (see below), whose sum is σ = 351263731200. Its totient is φ = 137270140128.

The previous prime is 221244131393. The next prime is 221244131483. The reversal of 221244131403 is 304131442122.

221244131403 is a `hidden beast` number, since 2 + 2 + 1 + 244 + 13 + 1 + 403 = 666.

It is not a de Polignac number, because 221244131403 - 2¹⁰ = 221244130379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (221244131483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4791493 + ... + 4837446.

It is an arithmetic number, because the mean of its divisors is an integer number (10976991600).

Almost surely, 2^221244131403 is an apocalyptic number.

221244131403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221244131403 is a deficient number, since it is larger than the sum of its proper divisors (130019599797).

221244131403 is a wasteful number, since it uses less digits than its factorization.

221244131403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9629008 (or 9629002 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 221244131403 its reverse (304131442122), we get a palindrome (525375573525).

The spelling of 221244131403 in words is "two hundred twenty-one billion, two hundred forty-four million, one hundred thirty-one thousand, four hundred three".