1001212100 has 54 divisors (see below), whose sum is σ = 2527357770. Its totient is φ = 343271040.

The previous prime is 1001212097. The next prime is 1001212111. The reversal of 1001212100 is 12121001.

1001212100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 349839616 + 651372484 = 18704^2 + 25522^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 97265 + ... + 107064.

Almost surely, 2^1001212100 is an apocalyptic number.

1001212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001212100 is an abundant number, since it is smaller than the sum of its proper divisors (1526145670).

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

1001212100 is a wasteful number, since it uses less digits than its factorization.

1001212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204357 (or 204343 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1001212100 is about 31641.9357814910. The cubic root of 1001212100 is about 1000.4038702002.

Adding to 1001212100 its reverse (12121001), we get a palindrome (1013333101).

The spelling of 1001212100 in words is "one billion, one million, two hundred twelve thousand, one hundred".