1001211100 has 18 divisors (see below), whose sum is σ = 2172628304. Its totient is φ = 400484400.

The previous prime is 1001211089. The next prime is 1001211121. The reversal of 1001211100 is 11121001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5005956 + ... + 5006155.

Almost surely, 2^1001211100 is an apocalyptic number.

1001211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001211100 is an abundant number, since it is smaller than the sum of its proper divisors (1171417204).

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

1001211100 is a wasteful number, since it uses less digits than its factorization.

1001211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10012125 (or 10012118 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1001211100 is about 31641.9199796725. The cubic root of 1001211100 is about 1000.4035371359.

Adding to 1001211100 its reverse (11121001), we get a palindrome (1012332101).

Subtracting from 1001211100 its reverse (11121001), we obtain a palindrome (990090099).

It can be divided in two parts, 10012 and 11100, that added together give a palindrome (21112).

The spelling of 1001211100 in words is "one billion, one million, two hundred eleven thousand, one hundred".