1005200243021 has 16 divisors (see below), whose sum is σ = 1117488787968. Its totient is φ = 897909192000.

The previous prime is 1005200243009. The next prime is 1005200243041. The reversal of 1005200243021 is 1203420025001.

1005200243021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1005200243021 - 2¹⁸ = 1005199980877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1005200242984 and 1005200243002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005200243041) 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, 17078375 + ... + 17137131.

It is an arithmetic number, because the mean of its divisors is an integer number (69843049248).

Almost surely, 2^{1005200243021} is an apocalyptic number.

It is an amenable number.

1005200243021 is a deficient number, since it is larger than the sum of its proper divisors (112288544947).

1005200243021 is a wasteful number, since it uses less digits than its factorization.

1005200243021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101252.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 1005200243021 its reverse (1203420025001), we get a palindrome (2208620268022).

The spelling of 1005200243021 in words is "one trillion, five billion, two hundred million, two hundred forty-three thousand, twenty-one".