221404122312 has 32 divisors (see below), whose sum is σ = 553672687680. Its totient is φ = 73779723200.

The previous prime is 221404122307. The next prime is 221404122341. The reversal of 221404122312 is 213221404122.

221404122312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 1269564 + ... + 1433387.

It is an arithmetic number, because the mean of its divisors is an integer number (17302271490).

Almost surely, 2^221404122312 is an apocalyptic number.

It is an amenable number.

221404122312 is an abundant number, since it is smaller than the sum of its proper divisors (332268565368).

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

221404122312 is a wasteful number, since it uses less digits than its factorization.

221404122312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706373 (or 2706369 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 221404122312 its reverse (213221404122), we get a palindrome (434625526434).

The spelling of 221404122312 in words is "two hundred twenty-one billion, four hundred four million, one hundred twenty-two thousand, three hundred twelve".