11100021312 has 112 divisors (see below), whose sum is σ = 31750447040. Its totient is φ = 3410491392.

The previous prime is 11100021287. The next prime is 11100021313. The reversal of 11100021312 is 21312000111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (11100021313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93858 + ... + 176094.

Almost surely, 2^11100021312 is an apocalyptic number.

11100021312 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 11100021312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15875223520).

11100021312 is an abundant number, since it is smaller than the sum of its proper divisors (20650425728).

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

11100021312 is a wasteful number, since it uses less digits than its factorization.

11100021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82308 (or 82298 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 11100021312 its reverse (21312000111), we get a palindrome (32412021423).

The spelling of 11100021312 in words is "eleven billion, one hundred million, twenty-one thousand, three hundred twelve".