221403132012 has 24 divisors (see below), whose sum is σ = 523883469312. Its totient is φ = 72761592400.

The previous prime is 221403131993. The next prime is 221403132029. The reversal of 221403132012 is 210231304122.

221403132012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221403132012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129930564 + ... + 129932267.

It is an arithmetic number, because the mean of its divisors is an integer number (21828477888).

Almost surely, 2^221403132012 is an apocalyptic number.

It is an amenable number.

221403132012 is an abundant number, since it is smaller than the sum of its proper divisors (302480337300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221403132012 is a wasteful number, since it uses less digits than its factorization.

221403132012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259862909 (or 259862907 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221403132012 its reverse (210231304122), we get a palindrome (431634436134).

The spelling of 221403132012 in words is "two hundred twenty-one billion, four hundred three million, one hundred thirty-two thousand, twelve".