202020101001 has 40 divisors (see below), whose sum is σ = 320664779424. Its totient is φ = 126309559680.

The previous prime is 202020100999. The next prime is 202020101009. The reversal of 202020101001 is 100101020202.

It is not a de Polignac number, because 202020101001 - 2¹ = 202020100999 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 (202020101009) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 130486 + ... + 648896.

Almost surely, 2^202020101001 is an apocalyptic number.

It is an amenable number.

202020101001 is a deficient number, since it is larger than the sum of its proper divisors (118644678423).

202020101001 is a wasteful number, since it uses less digits than its factorization.

202020101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518723 (or 518714 counting only the distinct ones).

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

Adding to 202020101001 its reverse (100101020202), we get a palindrome (302121121203).

The spelling of 202020101001 in words is "two hundred two billion, twenty million, one hundred one thousand, one".