1201100080 has 80 divisors (see below), whose sum is σ = 2886627744. Its totient is φ = 464486400.

The previous prime is 1201100071. The next prime is 1201100081. The reversal of 1201100080 is 800011021.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 1201100080.

It is not an unprimeable number, because it can be changed into a prime (1201100081) 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, 345712 + ... + 349168.

Almost surely, 2^1201100080 is an apocalyptic number.

1201100080 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 1201100080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1443313872).

1201100080 is an abundant number, since it is smaller than the sum of its proper divisors (1685527664).

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

1201100080 is a wasteful number, since it uses less digits than its factorization.

1201100080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3614 (or 3608 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1201100080 is about 34656.8908011091. The cubic root of 1201100080 is about 1062.9831948485.

The spelling of 1201100080 in words is "one billion, two hundred one million, one hundred thousand, eighty".