20210002101 has 48 divisors (see below), whose sum is σ = 31797365184. Its totient is φ = 12317640192.

The previous prime is 20210002079. The next prime is 20210002117. The reversal of 20210002101 is 10120001202.

It is not a de Polignac number, because 20210002101 - 2⁹ = 20210001589 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 (20210002301) 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, 3863850 + ... + 3869076.

It is an arithmetic number, because the mean of its divisors is an integer number (662445108).

Almost surely, 2^20210002101 is an apocalyptic number.

It is an amenable number.

20210002101 is a deficient number, since it is larger than the sum of its proper divisors (11587363083).

20210002101 is a wasteful number, since it uses less digits than its factorization.

20210002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5970 (or 5967 counting only the distinct ones).

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

Adding to 20210002101 its reverse (10120001202), we get a palindrome (30330003303).

The spelling of 20210002101 in words is "twenty billion, two hundred ten million, two thousand, one hundred one".