1012000200021 has 12 divisors (see below), whose sum is σ = 1463479798560. Its totient is φ = 673881385320.

The previous prime is 1012000200019. The next prime is 1012000200023. The reversal of 1012000200021 is 1200020002101.

It is an interprime number because it is at equal distance from previous prime (1012000200019) and next prime (1012000200023).

It is not a de Polignac number, because 1012000200021 - 2¹ = 1012000200019 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 = 1012000199976 and 1012000200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012000200023) 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, 65443065 + ... + 65458526.

It is an arithmetic number, because the mean of its divisors is an integer number (121956649880).

Almost surely, 2^{1012000200021} is an apocalyptic number.

It is an amenable number.

1012000200021 is a deficient number, since it is larger than the sum of its proper divisors (451479598539).

1012000200021 is a wasteful number, since it uses less digits than its factorization.

1012000200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130902456 (or 130902453 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1012000200021 its reverse (1200020002101), we get a palindrome (2212020202122).

The spelling of 1012000200021 in words is "one trillion, twelve billion, two hundred thousand, twenty-one".