221403323012 has 12 divisors (see below), whose sum is σ = 387493676556. Its totient is φ = 110690844000.

The previous prime is 221403322997. The next prime is 221403323021. The reversal of 221403323012 is 210323304122.

It can be written as a sum of positive squares in 2 ways, for example, as 11505565696 + 209897757316 = 107264^2 + 458146^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2658239 + ... + 2740262.

It is an arithmetic number, because the mean of its divisors is an integer number (32291139713).

Almost surely, 2^221403323012 is an apocalyptic number.

It is an amenable number.

221403323012 is a deficient number, since it is larger than the sum of its proper divisors (166090353544).

221403323012 is a wasteful number, since it uses less digits than its factorization.

221403323012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5408758 (or 5408756 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 221403323012 its reverse (210323304122), we get a palindrome (431726627134).

The spelling of 221403323012 in words is "two hundred twenty-one billion, four hundred three million, three hundred twenty-three thousand, twelve".