2321220040660 has 24 divisors (see below), whose sum is σ = 4877362021896. Its totient is φ = 927954695040.

The previous prime is 2321220040631. The next prime is 2321220040679. The reversal of 2321220040660 is 660400221232.

It can be written as a sum of positive squares in 4 ways, for example, as 161696656 + 2321058344004 = 12716^2 + 1523502^2 .

It is a super-2 number, since 2×2321220040660² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33296887 + ... + 33366526.

It is an arithmetic number, because the mean of its divisors is an integer number (203223417579).

Almost surely, 2^{2321220040660} is an apocalyptic number.

2321220040660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2321220040660 is an abundant number, since it is smaller than the sum of its proper divisors (2556141981236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2321220040660 is a wasteful number, since it uses less digits than its factorization.

2321220040660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66665163 (or 66665161 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 2321220040660 its reverse (660400221232), we get a palindrome (2981620261892).

The spelling of 2321220040660 in words is "two trillion, three hundred twenty-one billion, two hundred twenty million, forty thousand, six hundred sixty".