10010001120021 has 48 divisors (see below), whose sum is σ = 17554425452928. Its totient is φ = 5580488390400.

The previous prime is 10010001120013. The next prime is 10010001120061. The reversal of 10010001120021 is 12002110001001.

It is a happy number.

It is not a de Polignac number, because 10010001120021 - 2³ = 10010001120013 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 10010001119985 and 10010001120012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10010001120001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71695800 + ... + 71835281.

It is an arithmetic number, because the mean of its divisors is an integer number (365717196936).

Almost surely, 2^{10010001120021} is an apocalyptic number.

It is an amenable number.

10010001120021 is a deficient number, since it is larger than the sum of its proper divisors (7544424332907).

10010001120021 is an equidigital number, since it uses as much as digits as its factorization.

10010001120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143531144 (or 143531132 counting only the distinct ones).

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

Adding to 10010001120021 its reverse (12002110001001), we get a palindrome (22012111121022).

The spelling of 10010001120021 in words is "ten trillion, ten billion, one million, one hundred twenty thousand, twenty-one".