1011211100 has 72 divisors (see below), whose sum is σ = 2306935680. Its totient is φ = 383993280.

The previous prime is 1011211079. The next prime is 1011211127. The reversal of 1011211100 is 11121101.

It is a happy number.

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 23 ways as a sum of consecutive naturals, for example, 318119 + ... + 321281.

Almost surely, 2^1011211100 is an apocalyptic number.

1011211100 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 1011211100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153467840).

1011211100 is an abundant number, since it is smaller than the sum of its proper divisors (1295724580).

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

1011211100 is a wasteful number, since it uses less digits than its factorization.

1011211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339 (or 3332 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1011211100 is about 31799.5455942377. The cubic root of 1011211100 is about 1003.7231542524.

Adding to 1011211100 its reverse (11121101), we get a palindrome (1022332201).

It can be divided in two parts, 10112 and 11100, that added together give a palindrome (21212).

The spelling of 1011211100 in words is "one billion, eleven million, two hundred eleven thousand, one hundred".