10442321021 has 16 divisors (see below), whose sum is σ = 11650998528. Its totient is φ = 9277464000.

The previous prime is 10442320991. The next prime is 10442321023. The reversal of 10442321021 is 12012324401.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10442321021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10442320984 and 10442321002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10442321023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348011 + ... + 376823.

It is an arithmetic number, because the mean of its divisors is an integer number (728187408).

Almost surely, 2^10442321021 is an apocalyptic number.

10442321021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10442321021 is a deficient number, since it is larger than the sum of its proper divisors (1208677507).

10442321021 is a wasteful number, since it uses less digits than its factorization.

10442321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29572.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 10442321021 its reverse (12012324401), we get a palindrome (22454645422).

The spelling of 10442321021 in words is "ten billion, four hundred forty-two million, three hundred twenty-one thousand, twenty-one".