1201330100 has 72 divisors (see below), whose sum is σ = 2785342560. Its totient is φ = 448398720.

The previous prime is 1201330069. The next prime is 1201330103. The reversal of 1201330100 is 10331021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201330103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122582 + ... + 132018.

Almost surely, 2^1201330100 is an apocalyptic number.

1201330100 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 1201330100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1392671280).

1201330100 is an abundant number, since it is smaller than the sum of its proper divisors (1584012460).

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

1201330100 is a wasteful number, since it uses less digits than its factorization.

1201330100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9537 (or 9530 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1201330100 is about 34660.2091742101. The cubic root of 1201330100 is about 1063.0510470317.

Adding to 1201330100 its reverse (10331021), we get a palindrome (1211661121).

The spelling of 1201330100 in words is "one billion, two hundred one million, three hundred thirty thousand, one hundred".