2001012122010 has 64 divisors (see below), whose sum is σ = 5324899077504. Its totient is φ = 477141484800.

The previous prime is 2001012121981. The next prime is 2001012122017. The reversal of 2001012122010 is 102212101002.

It is not an unprimeable number, because it can be changed into a prime (2001012122017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49682109 + ... + 49722368.

It is an arithmetic number, because the mean of its divisors is an integer number (83201548086).

Almost surely, 2^{2001012122010} is an apocalyptic number.

2001012122010 is an abundant number, since it is smaller than the sum of its proper divisors (3323886955494).

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

2001012122010 is a wasteful number, since it uses less digits than its factorization.

2001012122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99404559.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2001012122010 its reverse (102212101002), we get a palindrome (2103224223012).

The spelling of 2001012122010 in words is "two trillion, one billion, twelve million, one hundred twenty-two thousand, ten".