321145130405 has 64 divisors (see below), whose sum is σ = 431988277248. Its totient is φ = 227193308160.

The previous prime is 321145130401. The next prime is 321145130417. The reversal of 321145130405 is 504031541123.

It is not a de Polignac number, because 321145130405 - 2² = 321145130401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321145130401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 541559789 + ... + 541560381.

It is an arithmetic number, because the mean of its divisors is an integer number (6749816832).

Almost surely, 2^321145130405 is an apocalyptic number.

It is an amenable number.

321145130405 is a deficient number, since it is larger than the sum of its proper divisors (110843146843).

321145130405 is a wasteful number, since it uses less digits than its factorization.

321145130405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 321145130405 its reverse (504031541123), we get a palindrome (825176671528).

The spelling of 321145130405 in words is "three hundred twenty-one billion, one hundred forty-five million, one hundred thirty thousand, four hundred five".