20001022011200 has 84 divisors (see below), whose sum is σ = 49470015626700. Its totient is φ = 7958955786240.

The previous prime is 20001022011193. The next prime is 20001022011221. The reversal of 20001022011200 is 211022010002.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3248242034944 + 16752779976256 = 1802288^2 + 4093016^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32076275 + ... + 32693874.

Almost surely, 2^{20001022011200} is an apocalyptic number.

20001022011200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001022011200 is an abundant number, since it is smaller than the sum of its proper divisors (29468993615500).

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

20001022011200 is a wasteful number, since it uses less digits than its factorization.

20001022011200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64770364 (or 64770349 counting only the distinct ones).

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

Adding to 20001022011200 its reverse (211022010002), we get a palindrome (20212044021202).

The spelling of 20001022011200 in words is "twenty trillion, one billion, twenty-two million, eleven thousand, two hundred".