20202120312100 has 36 divisors (see below), whose sum is σ = 43841338829764. Its totient is φ = 8080343470080.

The previous prime is 20202120312047. The next prime is 20202120312107. The reversal of 20202120312100 is 121302120202.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 582465081636 + 19619655230464 = 763194^2 + 4429408^2 .

It is not an unprimeable number, because it can be changed into a prime (20202120312107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4696869 + ... + 7903468.

Almost surely, 2^{20202120312100} is an apocalyptic number.

20202120312100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202120312100 is an abundant number, since it is smaller than the sum of its proper divisors (23639218517664).

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

20202120312100 is a wasteful number, since it uses less digits than its factorization.

20202120312100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12616384 (or 12616377 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20202120312100 its reverse (121302120202), we get a palindrome (20323422432302).

The spelling of 20202120312100 in words is "twenty trillion, two hundred two billion, one hundred twenty million, three hundred twelve thousand, one hundred".