20021200112020 has 48 divisors (see below), whose sum is σ = 43019453373120. Its totient is φ = 7824443982336.

The previous prime is 20021200111973. The next prime is 20021200112021. The reversal of 20021200112020 is 2021100212002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021200112021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51854037 + ... + 52238716.

It is an arithmetic number, because the mean of its divisors is an integer number (896238611940).

Almost surely, 2^{20021200112020} is an apocalyptic number.

20021200112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021200112020 is an abundant number, since it is smaller than the sum of its proper divisors (22998253261100).

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

20021200112020 is a wasteful number, since it uses less digits than its factorization.

20021200112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104092984 (or 104092982 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021200112020 its reverse (2021100212002), we get a palindrome (22042300324022).

The spelling of 20021200112020 in words is "twenty trillion, twenty-one billion, two hundred million, one hundred twelve thousand, twenty".