201022100020 has 48 divisors (see below), whose sum is σ = 482552421120. Its totient is φ = 68907665664.

The previous prime is 201022099961. The next prime is 201022100023. The reversal of 201022100020 is 20001220102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201022100023) 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, 545761 + ... + 836599.

It is an arithmetic number, because the mean of its divisors is an integer number (10053175440).

Almost surely, 2^201022100020 is an apocalyptic number.

201022100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201022100020 is an abundant number, since it is smaller than the sum of its proper divisors (281530321100).

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

201022100020 is a wasteful number, since it uses less digits than its factorization.

201022100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295792 (or 295790 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 201022100020 its reverse (20001220102), we get a palindrome (221023320122).

The spelling of 201022100020 in words is "two hundred one billion, twenty-two million, one hundred thousand, twenty".