10321221640 has 32 divisors (see below), whose sum is σ = 23616360000. Its totient is φ = 4058513344.

The previous prime is 10321221593. The next prime is 10321221653. The reversal of 10321221640 is 4612212301.

It is a super-2 number, since 2×10321221640² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2184340 + ... + 2189059.

It is an arithmetic number, because the mean of its divisors is an integer number (738011250).

Almost surely, 2^10321221640 is an apocalyptic number.

10321221640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10321221640 is an abundant number, since it is smaller than the sum of its proper divisors (13295138360).

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

10321221640 is a wasteful number, since it uses less digits than its factorization.

10321221640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373469 (or 4373465 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 10321221640 its reverse (4612212301), we get a palindrome (14933433941).

The spelling of 10321221640 in words is "ten billion, three hundred twenty-one million, two hundred twenty-one thousand, six hundred forty".