2001205421105 has 16 divisors (see below), whose sum is σ = 2619787665600. Its totient is φ = 1455406656960.

The previous prime is 2001205421101. The next prime is 2001205421113. The reversal of 2001205421105 is 5011245021002.

It is not a de Polignac number, because 2001205421105 - 2² = 2001205421101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001205421101) 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 15 ways as a sum of consecutive naturals, for example, 8785391 + ... + 9010299.

It is an arithmetic number, because the mean of its divisors is an integer number (163736729100).

Almost surely, 2^{2001205421105} is an apocalyptic number.

It is an amenable number.

2001205421105 is a deficient number, since it is larger than the sum of its proper divisors (618582244495).

2001205421105 is a wasteful number, since it uses less digits than its factorization.

2001205421105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386704.

The product of its (nonzero) digits is 800, while the sum is 23.

The spelling of 2001205421105 in words is "two trillion, one billion, two hundred five million, four hundred twenty-one thousand, one hundred five".