3231222505421 has 16 divisors (see below), whose sum is σ = 3302818799280. Its totient is φ = 3160647267840.

The previous prime is 3231222505331. The next prime is 3231222505439. The reversal of 3231222505421 is 1245052221323.

It can be written as a sum of positive squares in 8 ways, for example, as 110081949796 + 3121140555625 = 331786^2 + 1766675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3231222505421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231222505471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2105135 + ... + 3300611.

It is an arithmetic number, because the mean of its divisors is an integer number (206426174955).

Almost surely, 2^{3231222505421} is an apocalyptic number.

It is an amenable number.

3231222505421 is a deficient number, since it is larger than the sum of its proper divisors (71596293859).

3231222505421 is a wasteful number, since it uses less digits than its factorization.

3231222505421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195904.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 3231222505421 its reverse (1245052221323), we get a palindrome (4476274726744).

The spelling of 3231222505421 in words is "three trillion, two hundred thirty-one billion, two hundred twenty-two million, five hundred five thousand, four hundred twenty-one".