1010020200021 has 12 divisors (see below), whose sum is σ = 1667334933472. Its totient is φ = 577154399976.

The previous prime is 1010020199989. The next prime is 1010020200029. The reversal of 1010020200021 is 1200020200101.

It is not a de Polignac number, because 1010020200021 - 2⁵ = 1010020199989 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 = 1010020199976 and 1010020200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010020200029) 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, 8016033271 + ... + 8016033396.

Almost surely, 2^{1010020200021} is an apocalyptic number.

It is an amenable number.

1010020200021 is a deficient number, since it is larger than the sum of its proper divisors (657314733451).

1010020200021 is a wasteful number, since it uses less digits than its factorization.

1010020200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16032066680 (or 16032066677 counting only the distinct ones).

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

Adding to 1010020200021 its reverse (1200020200101), we get a palindrome (2210040400122).

The spelling of 1010020200021 in words is "one trillion, ten billion, twenty million, two hundred thousand, twenty-one".