321444144220442 has 32 divisors (see below), whose sum is σ = 486142121088000. Its totient is φ = 159402158107200.

The previous prime is 321444144220417. The next prime is 321444144220457. The reversal of 321444144220442 is 244022441444123.

It is a happy number.

It is a super-2 number, since 2×321444144220442² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321444144220442.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351869684 + ... + 352782032.

It is an arithmetic number, because the mean of its divisors is an integer number (15191941284000).

Almost surely, 2^{321444144220442} is an apocalyptic number.

321444144220442 is a deficient number, since it is larger than the sum of its proper divisors (164697976867558).

321444144220442 is a wasteful number, since it uses less digits than its factorization.

321444144220442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915302.

The product of its (nonzero) digits is 786432, while the sum is 41.

Adding to 321444144220442 its reverse (244022441444123), we get a palindrome (565466585664565).

The spelling of 321444144220442 in words is "three hundred twenty-one trillion, four hundred forty-four billion, one hundred forty-four million, two hundred twenty thousand, four hundred forty-two".