20010220212100 has 18 divisors (see below), whose sum is σ = 43422177860474. Its totient is φ = 8004088084800.

The previous prime is 20010220212089. The next prime is 20010220212107. The reversal of 20010220212100 is 121202201002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 23741262724 + 19986478949376 = 154082^2 + 4470624^2 .

It is not an unprimeable number, because it can be changed into a prime (20010220212107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100051100961 + ... + 100051101160.

Almost surely, 2^{20010220212100} is an apocalyptic number.

20010220212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010220212100 is an abundant number, since it is smaller than the sum of its proper divisors (23411957648374).

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

20010220212100 is a wasteful number, since it uses less digits than its factorization.

20010220212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200102202135 (or 200102202128 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20010220212100 its reverse (121202201002), we get a palindrome (20131422413102).

The spelling of 20010220212100 in words is "twenty trillion, ten billion, two hundred twenty million, two hundred twelve thousand, one hundred".