11212031100 has 72 divisors (see below), whose sum is σ = 34147536640. Its totient is φ = 2832511680.

The previous prime is 11212031057. The next prime is 11212031107. The reversal of 11212031100 is 113021211.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212031107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 977812 + ... + 989211.

Almost surely, 2^11212031100 is an apocalyptic number.

11212031100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212031100 is an abundant number, since it is smaller than the sum of its proper divisors (22935505540).

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

11212031100 is a wasteful number, since it uses less digits than its factorization.

11212031100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967059 (or 1967052 counting only the distinct ones).

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

Adding to 11212031100 its reverse (113021211), we get a palindrome (11325052311).

The spelling of 11212031100 in words is "eleven billion, two hundred twelve million, thirty-one thousand, one hundred".