20020120120100 has 18 divisors (see below), whose sum is σ = 43443660660834. Its totient is φ = 8008048048000.

The previous prime is 20020120120051. The next prime is 20020120120109. The reversal of 20020120120100 is 102102102002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 79530724 + 20020040589376 = 8918^2 + 4474376^2 .

It is not an unprimeable number, because it can be changed into a prime (20020120120109) 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, 100100600501 + ... + 100100600700.

Almost surely, 2^{20020120120100} is an apocalyptic number.

20020120120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020120120100 is an abundant number, since it is smaller than the sum of its proper divisors (23423540540734).

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

20020120120100 is a wasteful number, since it uses less digits than its factorization.

20020120120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200201201215 (or 200201201208 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20020120120100 its reverse (102102102002), we get a palindrome (20122222222102).

The spelling of 20020120120100 in words is "twenty trillion, twenty billion, one hundred twenty million, one hundred twenty thousand, one hundred".