202102100001 has 16 divisors (see below), whose sum is σ = 299431854720. Its totient is φ = 134725132080.

The previous prime is 202102099987. The next prime is 202102100009. The reversal of 202102100001 is 100001201202.

It is not a de Polignac number, because 202102100001 - 2⁶ = 202102099937 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 (202102100009) 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, 129931 + ... + 648911.

It is an arithmetic number, because the mean of its divisors is an integer number (18714490920).

Almost surely, 2^202102100001 is an apocalyptic number.

It is an amenable number.

202102100001 is a deficient number, since it is larger than the sum of its proper divisors (97329754719).

202102100001 is a wasteful number, since it uses less digits than its factorization.

202102100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533413 (or 533407 counting only the distinct ones).

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

Adding to 202102100001 its reverse (100001201202), we get a palindrome (302103301203).

The spelling of 202102100001 in words is "two hundred two billion, one hundred two million, one hundred thousand, one".