20021020010120 has 16 divisors (see below), whose sum is σ = 45047295022860. Its totient is φ = 8008408004032.

The previous prime is 20021020010087. The next prime is 20021020010161. The reversal of 20021020010120 is 2101002012002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16494368878276 + 3526651131844 = 4061326^2 + 1877938^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250262750087 + ... + 250262750166.

Almost surely, 2^{20021020010120} is an apocalyptic number.

20021020010120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021020010120 is an abundant number, since it is smaller than the sum of its proper divisors (25026275012740).

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

20021020010120 is a wasteful number, since it uses less digits than its factorization.

20021020010120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500525500264 (or 500525500260 counting only the distinct ones).

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

Adding to 20021020010120 its reverse (2101002012002), we get a palindrome (22122022022122).

The spelling of 20021020010120 in words is "twenty trillion, twenty-one billion, twenty million, ten thousand, one hundred twenty".