20020102101 has 8 divisors (see below), whose sum is σ = 29659410560. Its totient is φ = 13346734716.

The previous prime is 20020102061. The next prime is 20020102127. The reversal of 20020102101 is 10120102002.

It is not a de Polignac number, because 20020102101 - 2⁹ = 20020101589 is a prime.

It is a super-2 number, since 2×20020102101² (a number of 21 digits) contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020102171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370742605 + ... + 370742658.

It is an arithmetic number, because the mean of its divisors is an integer number (3707426320).

Almost surely, 2^20020102101 is an apocalyptic number.

It is an amenable number.

20020102101 is a deficient number, since it is larger than the sum of its proper divisors (9639308459).

20020102101 is an equidigital number, since it uses as much as digits as its factorization.

20020102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741485272 (or 741485266 counting only the distinct ones).

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

Adding to 20020102101 its reverse (10120102002), we get a palindrome (30140204103).

Subtracting from 20020102101 its reverse (10120102002), we obtain a palindrome (9900000099).

The spelling of 20020102101 in words is "twenty billion, twenty million, one hundred two thousand, one hundred one".