20001200001120 has 144 divisors (see below), whose sum is σ = 73504410072912. Its totient is φ = 4923372303360.

The previous prime is 20001200001077. The next prime is 20001200001169. The reversal of 20001200001120 is 2110000210002.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 534201366 + ... + 534238805.

It is an arithmetic number, because the mean of its divisors is an integer number (510447292173).

Almost surely, 2^{20001200001120} is an apocalyptic number.

20001200001120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001200001120 is an abundant number, since it is smaller than the sum of its proper divisors (53503210071792).

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

20001200001120 is a wasteful number, since it uses less digits than its factorization.

20001200001120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068440205 (or 1068440194 counting only the distinct ones).

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

Adding to 20001200001120 its reverse (2110000210002), we get a palindrome (22111200211122).

The spelling of 20001200001120 in words is "twenty trillion, one billion, two hundred million, one thousand, one hundred twenty".