321220141445 has 16 divisors (see below), whose sum is σ = 440599651968. Its totient is φ = 220230653760.

The previous prime is 321220141409. The next prime is 321220141469. The reversal of 321220141445 is 544141022123.

It is a happy number.

It is not a de Polignac number, because 321220141445 - 2³⁰ = 320146399621 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 493451 + ... + 941240.

It is an arithmetic number, because the mean of its divisors is an integer number (27537478248).

Almost surely, 2^321220141445 is an apocalyptic number.

321220141445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

321220141445 is a deficient number, since it is larger than the sum of its proper divisors (119379510523).

321220141445 is a wasteful number, since it uses less digits than its factorization.

321220141445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441100.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 321220141445 its reverse (544141022123), we get a palindrome (865361163568).

The spelling of 321220141445 in words is "three hundred twenty-one billion, two hundred twenty million, one hundred forty-one thousand, four hundred forty-five".