20210100102 has 32 divisors (see below), whose sum is σ = 45031784160. Its totient is φ = 6718632480.

The previous prime is 20210100047. The next prime is 20210100107. The reversal of 20210100102 is 20100101202.

It is a super-3 number, since 3×20210100102³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 (20210100107) 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, 481549 + ... + 521832.

It is an arithmetic number, because the mean of its divisors is an integer number (1407243255).

Almost surely, 2^20210100102 is an apocalyptic number.

20210100102 is an abundant number, since it is smaller than the sum of its proper divisors (24821684058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20210100102 is a wasteful number, since it uses less digits than its factorization.

20210100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003765 (or 1003759 counting only the distinct ones).

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

Adding to 20210100102 its reverse (20100101202), we get a palindrome (40310201304).

The spelling of 20210100102 in words is "twenty billion, two hundred ten million, one hundred thousand, one hundred two".