20021110020000 has 180 divisors, whose sum is σ = 71146016151210. Its totient is φ = 5338962624000.

The previous prime is 20021110019983. The next prime is 20021110020001. The reversal of 20021110020000 is 2001112002.

It can be written as a sum of positive squares in 5 ways, for example, as 1889558150544 + 18131551869456 = 1374612^2 + 4258116^2 .

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20021110020001) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 55434195 + ... + 55794194.

Almost surely, 2^{20021110020000} is an apocalyptic number.

20021110020000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021110020000 is an abundant number, since it is smaller than the sum of its proper divisors (51124906131210).

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

20021110020000 is a wasteful number, since it uses less digits than its factorization.

20021110020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111228425 (or 111228399 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20021110020000 its reverse (2001112002), we get a palindrome (20023111132002).

The spelling of 20021110020000 in words is "twenty trillion, twenty-one billion, one hundred ten million, twenty thousand".