11100001212 has 60 divisors (see below), whose sum is σ = 29075036760. Its totient is φ = 3692676384.

The previous prime is 11100001207. The next prime is 11100001219. The reversal of 11100001212 is 21210000111.

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 = 11100001194 and 11100001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100001219) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 131263 + ... + 198569.

It is an arithmetic number, because the mean of its divisors is an integer number (484583946).

Almost surely, 2^11100001212 is an apocalyptic number.

11100001212 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 11100001212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14537518380).

11100001212 is an abundant number, since it is smaller than the sum of its proper divisors (17975035548).

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

11100001212 is a wasteful number, since it uses less digits than its factorization.

11100001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67832 (or 67821 counting only the distinct ones).

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

Adding to 11100001212 its reverse (21210000111), we get a palindrome (32310001323).

The spelling of 11100001212 in words is "eleven billion, one hundred million, one thousand, two hundred twelve".