201001202109 has 16 divisors (see below), whose sum is σ = 297809265600. Its totient is φ = 133987433328.

The previous prime is 201001202107. The next prime is 201001202113. The reversal of 201001202109 is 901202100102.

It is not a de Polignac number, because 201001202109 - 2¹ = 201001202107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201001202091 and 201001202100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001202107) 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 15 ways as a sum of consecutive naturals, for example, 91854 + ... + 640655.

It is an arithmetic number, because the mean of its divisors is an integer number (18613079100).

Almost surely, 2^201001202109 is an apocalyptic number.

It is an amenable number.

201001202109 is a deficient number, since it is larger than the sum of its proper divisors (96808063491).

201001202109 is a wasteful number, since it uses less digits than its factorization.

201001202109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742681 (or 742675 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 201001202109 in words is "two hundred one billion, one million, two hundred two thousand, one hundred nine".