20020121212100 has 72 divisors (see below), whose sum is σ = 45409748465088. Its totient is φ = 7646822761600.

The previous prime is 20020121212061. The next prime is 20020121212127. The reversal of 20020121212100 is 121212102002.

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, 6064211 + ... + 8764410.

It is an arithmetic number, because the mean of its divisors is an integer number (630690950904).

Almost surely, 2^{20020121212100} is an apocalyptic number.

20020121212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020121212100 is an abundant number, since it is smaller than the sum of its proper divisors (25389627252988).

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

20020121212100 is a wasteful number, since it uses less digits than its factorization.

20020121212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14829245 (or 14829238 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20020121212100 its reverse (121212102002), we get a palindrome (20141333314102).

The spelling of 20020121212100 in words is "twenty trillion, twenty billion, one hundred twenty-one million, two hundred twelve thousand, one hundred".