2001163146112 has 128 divisors (see below), whose sum is σ = 4467706488000. Its totient is φ = 891761375232.

The previous prime is 2001163146097. The next prime is 2001163146119. The reversal of 2001163146112 is 2116413611002.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001163146119) 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, 8032573 + ... + 8277955.

Almost surely, 2^{2001163146112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001163146112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2233853244000).

2001163146112 is an abundant number, since it is smaller than the sum of its proper divisors (2466543341888).

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

2001163146112 is an equidigital number, since it uses as much as digits as its factorization.

2001163146112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245465 (or 245427 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 2001163146112 its reverse (2116413611002), we get a palindrome (4117576757114).

The spelling of 2001163146112 in words is "two trillion, one billion, one hundred sixty-three million, one hundred forty-six thousand, one hundred twelve".