201012201009 has 12 divisors (see below), whose sum is σ = 290861247300. Its totient is φ = 133772615424.

The previous prime is 201012200929. The next prime is 201012201017. The reversal of 201012201009 is 900102210102.

It can be written as a sum of positive squares in 2 ways, for example, as 139896944784 + 61115256225 = 374028^2 + 247215^2 .

It is not a de Polignac number, because 201012201009 - 2²⁷ = 200877983281 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201012200982 and 201012201000.

It is not an unprimeable number, because it can be changed into a prime (201012201059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19621144 + ... + 19631385.

It is an arithmetic number, because the mean of its divisors is an integer number (24238437275).

Almost surely, 2^201012201009 is an apocalyptic number.

It is an amenable number.

201012201009 is a deficient number, since it is larger than the sum of its proper divisors (89849046291).

201012201009 is a wasteful number, since it uses less digits than its factorization.

201012201009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39253104 (or 39253101 counting only the distinct ones).

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

The spelling of 201012201009 in words is "two hundred one billion, twelve million, two hundred one thousand, nine".