10010001201021 has 20 divisors (see below), whose sum is σ = 15030689474812. Its totient is φ = 6638757262848.

The previous prime is 10010001201007. The next prime is 10010001201043. The reversal of 10010001201021 is 12010210001001.

It is a happy number.

10010001201021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2861463195396 + 7148538005625 = 1691586^2 + 2673675^2 .

It is not a de Polignac number, because 10010001201021 - 2¹⁰ = 10010001199997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10010001200994 and 10010001201012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10010001201091) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 320140486 + ... + 320171751.

Almost surely, 2^{10010001201021} is an apocalyptic number.

It is an amenable number.

10010001201021 is a deficient number, since it is larger than the sum of its proper divisors (5020688273791).

10010001201021 is an equidigital number, since it uses as much as digits as its factorization.

10010001201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640312442 (or 640312433 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10010001201021 its reverse (12010210001001), we get a palindrome (22020211202022).

The spelling of 10010001201021 in words is "ten trillion, ten billion, one million, two hundred one thousand, twenty-one".