10021103522721 has 24 divisors (see below), whose sum is σ = 15294262838400. Its totient is φ = 6554684056752.

The previous prime is 10021103522671. The next prime is 10021103522737. The reversal of 10021103522721 is 12722530112001.

It is a happy number.

10021103522721 is a `hidden beast` number, since 1 + 0 + 0 + 2 + 110 + 3 + 522 + 7 + 21 = 666.

It is not a de Polignac number, because 10021103522721 - 2¹⁹ = 10021102998433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (10021103522741) 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 23 ways as a sum of consecutive naturals, for example, 389035321 + ... + 389061078.

It is an arithmetic number, because the mean of its divisors is an integer number (637260951600).

Almost surely, 2^{10021103522721} is an apocalyptic number.

It is an amenable number.

10021103522721 is a deficient number, since it is larger than the sum of its proper divisors (5273159315679).

10021103522721 is an frugal number, since it uses more digits than its factorization.

10021103522721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778096467 (or 778096455 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

Adding to 10021103522721 its reverse (12722530112001), we get a palindrome (22743633634722).

The spelling of 10021103522721 in words is "ten trillion, twenty-one billion, one hundred three million, five hundred twenty-two thousand, seven hundred twenty-one".