1200201009 has 16 divisors (see below), whose sum is σ = 1829778432. Its totient is φ = 685491408.

The previous prime is 1200201007. The next prime is 1200201029. The reversal of 1200201009 is 9001020021.

It is a happy number.

It is not a de Polignac number, because 1200201009 - 2¹ = 1200201007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200201007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33292 + ... + 59234.

It is an arithmetic number, because the mean of its divisors is an integer number (114361152).

Almost surely, 2^1200201009 is an apocalyptic number.

It is an amenable number.

1200201009 is a deficient number, since it is larger than the sum of its proper divisors (629577423).

1200201009 is a wasteful number, since it uses less digits than its factorization.

1200201009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28156.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1200201009 is about 34643.9173448962. The cubic root of 1200201009 is about 1062.7179002967.

The spelling of 1200201009 in words is "one billion, two hundred million, two hundred one thousand, nine".