20021301102 has 64 divisors (see below), whose sum is σ = 45326502144. Its totient is φ = 5842160640.

The previous prime is 20021301077. The next prime is 20021301107. The reversal of 20021301102 is 20110312002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021301107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194613 + ... + 279135.

It is an arithmetic number, because the mean of its divisors is an integer number (708226596).

Almost surely, 2^20021301102 is an apocalyptic number.

20021301102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021301102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22663251072).

20021301102 is an abundant number, since it is smaller than the sum of its proper divisors (25305201042).

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

20021301102 is a wasteful number, since it uses less digits than its factorization.

20021301102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84673.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20021301102 its reverse (20110312002), we get a palindrome (40131613104).

It can be divided in two parts, 20021 and 301102, that added together give a palindrome (321123).

The spelling of 20021301102 in words is "twenty billion, twenty-one million, three hundred one thousand, one hundred two".