2001205554011 has 4 divisors (see below), whose sum is σ = 2001383339592. Its totient is φ = 2001027768432.

The previous prime is 2001205553989. The next prime is 2001205554031. The reversal of 2001205554011 is 1104555021002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001205554011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001205554031) 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 3 ways as a sum of consecutive naturals, for example, 88875905 + ... + 88898418.

It is an arithmetic number, because the mean of its divisors is an integer number (500345834898).

Almost surely, 2^{2001205554011} is an apocalyptic number.

2001205554011 is a deficient number, since it is larger than the sum of its proper divisors (177785581).

2001205554011 is a wasteful number, since it uses less digits than its factorization.

2001205554011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177785580.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 2001205554011 in words is "two trillion, one billion, two hundred five million, five hundred fifty-four thousand, eleven".