10002000111021 has 12 divisors (see below), whose sum is σ = 14447458921948. Its totient is φ = 6667942184064.

The previous prime is 10002000111017. The next prime is 10002000111073. The reversal of 10002000111021 is 12011100020001.

It is a happy number.

10002000111021 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 2024115125796 + 7977884985225 = 1422714^2 + 2824515^2 .

It is not a de Polignac number, because 10002000111021 - 2² = 10002000111017 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 Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10002000110994 and 10002000111012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002000111011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3716530 + ... + 5815203.

Almost surely, 2^{10002000111021} is an apocalyptic number.

It is an amenable number.

10002000111021 is a deficient number, since it is larger than the sum of its proper divisors (4445458810927).

10002000111021 is a wasteful number, since it uses less digits than its factorization.

10002000111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9648332 (or 9648329 counting only the distinct ones).

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

Adding to 10002000111021 its reverse (12011100020001), we get a palindrome (22013100131022).

The spelling of 10002000111021 in words is "ten trillion, two billion, one hundred eleven thousand, twenty-one".