221312001003 has 16 divisors (see below), whose sum is σ = 309309576576. Its totient is φ = 140595255360.

The previous prime is 221312000977. The next prime is 221312001047. The reversal of 221312001003 is 300100213122.

It is not a de Polignac number, because 221312001003 - 2⁵ = 221312000971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221312001803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20916625 + ... + 20927202.

It is an arithmetic number, because the mean of its divisors is an integer number (19331848536).

Almost surely, 2^221312001003 is an apocalyptic number.

221312001003 is a deficient number, since it is larger than the sum of its proper divisors (87997575573).

221312001003 is a wasteful number, since it uses less digits than its factorization.

221312001003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41843914.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 221312001003 its reverse (300100213122), we get a palindrome (521412214125).

The spelling of 221312001003 in words is "two hundred twenty-one billion, three hundred twelve million, one thousand, three".