641323023021 has 12 divisors (see below), whose sum is σ = 928211908000. Its totient is φ = 426691868040.

The previous prime is 641323023017. The next prime is 641323023037. The reversal of 641323023021 is 120320323146.

It is not a de Polignac number, because 641323023021 - 2² = 641323023017 is a prime.

It is a super-2 number, since 2×641323023021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641323023071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71396425 + ... + 71405406.

Almost surely, 2^641323023021 is an apocalyptic number.

It is an amenable number.

641323023021 is a deficient number, since it is larger than the sum of its proper divisors (286888884979).

641323023021 is a wasteful number, since it uses less digits than its factorization.

641323023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142802336 (or 142802333 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 641323023021 its reverse (120320323146), we get a palindrome (761643346167).

The spelling of 641323023021 in words is "six hundred forty-one billion, three hundred twenty-three million, twenty-three thousand, twenty-one".