221312144342442 has 8 divisors (see below), whose sum is σ = 442624288684896. Its totient is φ = 73770714780812.

The previous prime is 221312144342413. The next prime is 221312144342573. The reversal of 221312144342442 is 244243441213122.

It is a sphenic number, since it is the product of 3 distinct primes.

221312144342442 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 221312144342442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18442678695198 + ... + 18442678695209.

It is an arithmetic number, because the mean of its divisors is an integer number (55328036085612).

Almost surely, 2^{221312144342442} is an apocalyptic number.

221312144342442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221312144342442 is a wasteful number, since it uses less digits than its factorization.

221312144342442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36885357390412.

The product of its digits is 294912, while the sum is 39.

Adding to 221312144342442 its reverse (244243441213122), we get a palindrome (465555585555564).

The spelling of 221312144342442 in words is "two hundred twenty-one trillion, three hundred twelve billion, one hundred forty-four million, three hundred forty-two thousand, four hundred forty-two".