2001122121011 has 8 divisors (see below), whose sum is σ = 2158324790160. Its totient is φ = 1844386623072.

The previous prime is 2001122120999. The next prime is 2001122121049. The reversal of 2001122121011 is 1101212211002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001122121011 - 2⁶ = 2001122120947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001122121071) 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, 116783900 + ... + 116801033.

It is an arithmetic number, because the mean of its divisors is an integer number (269790598770).

Almost surely, 2^{2001122121011} is an apocalyptic number.

2001122121011 is a deficient number, since it is larger than the sum of its proper divisors (157202669149).

2001122121011 is a wasteful number, since it uses less digits than its factorization.

2001122121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233585605.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2001122121011 its reverse (1101212211002), we get a palindrome (3102334332013).

The spelling of 2001122121011 in words is "two trillion, one billion, one hundred twenty-two million, one hundred twenty-one thousand, eleven".