10021321440 has 216 divisors, whose sum is σ = 37031609160. Its totient is φ = 2466726912.

The previous prime is 10021321439. The next prime is 10021321469. The reversal of 10021321440 is 4412312001.

10021321440 is a `hidden beast` number, since 10 + 0 + 213 + 2 + 1 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 222771 + ... + 263949.

It is an arithmetic number, because the mean of its divisors is an integer number (171442635).

Almost surely, 2^10021321440 is an apocalyptic number.

10021321440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10021321440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18515804580).

10021321440 is an abundant number, since it is smaller than the sum of its proper divisors (27010287720).

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

10021321440 is a wasteful number, since it uses less digits than its factorization.

10021321440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41226 (or 41202 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 10021321440 its reverse (4412312001), we get a palindrome (14433633441).

The spelling of 10021321440 in words is "ten billion, twenty-one million, three hundred twenty-one thousand, four hundred forty".