20201012011009 has 4 divisors (see below), whose sum is σ = 21389306835204. Its totient is φ = 19012717186816.

The previous prime is 20201012010931. The next prime is 20201012011013. The reversal of 20201012011009 is 90011021010202.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5686794090000 + 14514217921009 = 2384700^2 + 3809753^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201012011009 - 2²¹ = 20201009913857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201012011039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594147412072 + ... + 594147412105.

It is an arithmetic number, because the mean of its divisors is an integer number (5347326708801).

Almost surely, 2^{20201012011009} is an apocalyptic number.

It is an amenable number.

20201012011009 is a deficient number, since it is larger than the sum of its proper divisors (1188294824195).

20201012011009 is a wasteful number, since it uses less digits than its factorization.

20201012011009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188294824194.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 20201012011009 in words is "twenty trillion, two hundred one billion, twelve million, eleven thousand, nine".