20021022020100 has 72 divisors (see below), whose sum is σ = 57928843393120. Its totient is φ = 5338814503680.

The previous prime is 20021022020089. The next prime is 20021022020117. The reversal of 20021022020100 is 102022012002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12460344 + ... + 13975056.

Almost surely, 2^{20021022020100} is an apocalyptic number.

20021022020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021022020100 is an abundant number, since it is smaller than the sum of its proper divisors (37907821373020).

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

20021022020100 is a wasteful number, since it uses less digits than its factorization.

20021022020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558789 (or 1558782 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20021022020100 its reverse (102022012002), we get a palindrome (20123044032102).

The spelling of 20021022020100 in words is "twenty trillion, twenty-one billion, twenty-two million, twenty thousand, one hundred".