2001135521111 has 16 divisors (see below), whose sum is σ = 2178454435200. Its totient is φ = 1830977287680.

The previous prime is 2001135521051. The next prime is 2001135521131. The reversal of 2001135521111 is 1111255311002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001135521111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001135521131) 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, 8285480 + ... + 8523581.

It is an arithmetic number, because the mean of its divisors is an integer number (136153402200).

Almost surely, 2^{2001135521111} is an apocalyptic number.

2001135521111 is a deficient number, since it is larger than the sum of its proper divisors (177318914089).

2001135521111 is a wasteful number, since it uses less digits than its factorization.

2001135521111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16809274.

The product of its (nonzero) digits is 300, while the sum is 23.

The spelling of 2001135521111 in words is "two trillion, one billion, one hundred thirty-five million, five hundred twenty-one thousand, one hundred eleven".