1000021020201 has 120 divisors (see below), whose sum is σ = 1791349312896. Its totient is φ = 554044276800.

The previous prime is 1000021020199. The next prime is 1000021020227. The reversal of 1000021020201 is 1020201200001.

It is not a de Polignac number, because 1000021020201 - 2¹ = 1000021020199 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1000021020001) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 19935051 + ... + 19985151.

Almost surely, 2^{1000021020201} is an apocalyptic number.

It is an amenable number.

1000021020201 is a deficient number, since it is larger than the sum of its proper divisors (791328292695).

1000021020201 is a wasteful number, since it uses less digits than its factorization.

1000021020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50281 (or 50265 counting only the distinct ones).

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

Adding to 1000021020201 its reverse (1020201200001), we get a palindrome (2020222220202).

The spelling of 1000021020201 in words is "one trillion, twenty-one million, twenty thousand, two hundred one".