20201002101 has 48 divisors (see below), whose sum is σ = 34833931200. Its totient is φ = 11536662816.

The previous prime is 20201002057. The next prime is 20201002117. The reversal of 20201002101 is 10120010202.

It is not a de Polignac number, because 20201002101 - 2¹⁵ = 20200969333 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201001101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3030310 + ... + 3036968.

It is an arithmetic number, because the mean of its divisors is an integer number (725706900).

Almost surely, 2^20201002101 is an apocalyptic number.

20201002101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20201002101 is a deficient number, since it is larger than the sum of its proper divisors (14632929099).

20201002101 is a wasteful number, since it uses less digits than its factorization.

20201002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8975 (or 8962 counting only the distinct ones).

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

Adding to 20201002101 its reverse (10120010202), we get a palindrome (30321012303).

The spelling of 20201002101 in words is "twenty billion, two hundred one million, two thousand, one hundred one".