10021721223623 has 16 divisors (see below), whose sum is σ = 10309268692800. Its totient is φ = 9737904084480.

The previous prime is 10021721223557. The next prime is 10021721223671. The reversal of 10021721223623 is 32632212712001.

It is a cyclic number.

It is not a de Polignac number, because 10021721223623 - 2¹² = 10021721219527 is a prime.

It is a super-2 number, since 2×10021721223623² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10021721223623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021721223823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12082718 + ... + 12885476.

It is an arithmetic number, because the mean of its divisors is an integer number (644329293300).

Almost surely, 2^{10021721223623} is an apocalyptic number.

10021721223623 is a deficient number, since it is larger than the sum of its proper divisors (287547469177).

10021721223623 is a wasteful number, since it uses less digits than its factorization.

10021721223623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805082.

The product of its (nonzero) digits is 12096, while the sum is 32.

Adding to 10021721223623 its reverse (32632212712001), we get a palindrome (42653933935624).

The spelling of 10021721223623 in words is "ten trillion, twenty-one billion, seven hundred twenty-one million, two hundred twenty-three thousand, six hundred twenty-three".