20120211210100 has 18 divisors (see below), whose sum is σ = 43660858326134. Its totient is φ = 8048084484000.

The previous prime is 20120211210091. The next prime is 20120211210131. The reversal of 20120211210100 is 101211202102.

It can be written as a sum of positive squares in 3 ways, for example, as 87174924516 + 20033036285584 = 295254^2 + 4475828^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100601055951 + ... + 100601056150.

Almost surely, 2^{20120211210100} is an apocalyptic number.

20120211210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120211210100 is an abundant number, since it is smaller than the sum of its proper divisors (23540647116034).

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

20120211210100 is a wasteful number, since it uses less digits than its factorization.

20120211210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201202112115 (or 201202112108 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20120211210100 its reverse (101211202102), we get a palindrome (20221422412202).

The spelling of 20120211210100 in words is "twenty trillion, one hundred twenty billion, two hundred eleven million, two hundred ten thousand, one hundred".