2001001000120 has 32 divisors (see below), whose sum is σ = 4502371068000. Its totient is φ = 800379276928.

The previous prime is 2001001000099. The next prime is 2001001000121. The reversal of 2001001000120 is 210001001002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001001000121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921306 + ... + 2202454.

It is an arithmetic number, because the mean of its divisors is an integer number (140699095875).

Almost surely, 2^{2001001000120} is an apocalyptic number.

2001001000120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001001000120 is an abundant number, since it is smaller than the sum of its proper divisors (2501370067880).

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

2001001000120 is a wasteful number, since it uses less digits than its factorization.

2001001000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320207 (or 1320203 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 2001001000120 its reverse (210001001002), we get a palindrome (2211002001122).

The spelling of 2001001000120 in words is "two trillion, one billion, one million, one hundred twenty", and thus it is an aban number.