1209010000 has 200 divisors, whose sum is σ = 3312064800. Its totient is φ = 423360000.

The previous prime is 1209009979. The next prime is 1209010021. The reversal of 1209010000 is 109021.

It is an interprime number because it is at equal distance from previous prime (1209009979) and next prime (1209010021).

It is a tau number, because it is divible by the number of its divisors (200).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3189811 + ... + 3190189.

It is an arithmetic number, because the mean of its divisors is an integer number (16560324).

Almost surely, 2^1209010000 is an apocalyptic number.

1209010000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209010000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1656032400).

1209010000 is an abundant number, since it is smaller than the sum of its proper divisors (2103054800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1209010000 is a wasteful number, since it uses less digits than its factorization.

1209010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1209010000 is about 34770.8211004572. The cubic root of 1209010000 is about 1065.3115386790.

Adding to 1209010000 its reverse (109021), we get a palindrome (1209119021).

The spelling of 1209010000 in words is "one billion, two hundred nine million, ten thousand".