321220431041 has 4 divisors (see below), whose sum is σ = 340115750532. Its totient is φ = 302325111552.

The previous prime is 321220431017. The next prime is 321220431047. The reversal of 321220431041 is 140134022123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 140134022123 = 67 ⋅2091552569.

It can be written as a sum of positive squares in 2 ways, for example, as 92109822016 + 229110609025 = 303496^2 + 478655^2 .

It is a cyclic number.

It is not a de Polignac number, because 321220431041 - 2⁶ = 321220430977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 321220430998 and 321220431016.

It is not an unprimeable number, because it can be changed into a prime (321220431047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9447659720 + ... + 9447659753.

It is an arithmetic number, because the mean of its divisors is an integer number (85028937633).

Almost surely, 2^321220431041 is an apocalyptic number.

It is an amenable number.

321220431041 is a deficient number, since it is larger than the sum of its proper divisors (18895319491).

321220431041 is a wasteful number, since it uses less digits than its factorization.

321220431041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18895319490.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 321220431041 its reverse (140134022123), we get a palindrome (461354453164).

The spelling of 321220431041 in words is "three hundred twenty-one billion, two hundred twenty million, four hundred thirty-one thousand, forty-one".