1100101212 has 144 divisors (see below), whose sum is σ = 3378316032. Its totient is φ = 294658560.

The previous prime is 1100101199. The next prime is 1100101271. The reversal of 1100101212 is 2121010011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1100101194 and 1100101203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2103183 + ... + 2103705.

It is an arithmetic number, because the mean of its divisors is an integer number (23460528).

Almost surely, 2^1100101212 is an apocalyptic number.

1100101212 is a gapful number since it is divisible by the number (12) 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 1100101212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1689158016).

1100101212 is an abundant number, since it is smaller than the sum of its proper divisors (2278214820).

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

1100101212 is a wasteful number, since it uses less digits than its factorization.

1100101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1043 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1100101212 is about 33167.7736967678. The cubic root of 1100101212 is about 1032.3117748293.

Adding to 1100101212 its reverse (2121010011), we get a palindrome (3221111223).

The spelling of 1100101212 in words is "one billion, one hundred million, one hundred one thousand, two hundred twelve".