11012021100 has 108 divisors (see below), whose sum is σ = 34550976096. Its totient is φ = 2933612160.

The previous prime is 11012021077. The next prime is 11012021117. The reversal of 11012021100 is 112021011.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 987154 + ... + 998246.

Almost surely, 2^11012021100 is an apocalyptic number.

11012021100 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 11012021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17275488048).

11012021100 is an abundant number, since it is smaller than the sum of its proper divisors (23538954996).

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

11012021100 is a wasteful number, since it uses less digits than its factorization.

11012021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12216 (or 12206 counting only the distinct ones).

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

Adding to 11012021100 its reverse (112021011), we get a palindrome (11124042111).

The spelling of 11012021100 in words is "eleven billion, twelve million, twenty-one thousand, one hundred".