2001121012 has 12 divisors (see below), whose sum is σ = 3820322016. Its totient is φ = 909600440.

The previous prime is 2001120973. The next prime is 2001121019. The reversal of 2001121012 is 2101211002.

It is a self number, because there is not a number n which added to its sum of digits gives 2001121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001121019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22739968 + ... + 22740055.

It is an arithmetic number, because the mean of its divisors is an integer number (318360168).

Almost surely, 2^2001121012 is an apocalyptic number.

2001121012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2001121012 is a deficient number, since it is larger than the sum of its proper divisors (1819201004).

2001121012 is a wasteful number, since it uses less digits than its factorization.

2001121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45480038 (or 45480036 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2001121012 is about 44733.8910894190. The cubic root of 2001121012 is about 1260.1564036973.

Adding to 2001121012 its reverse (2101211002), we get a palindrome (4102332014).

The spelling of 2001121012 in words is "two billion, one million, one hundred twenty-one thousand, twelve".