11100222012 has 72 divisors (see below), whose sum is σ = 30143888208. Its totient is φ = 3165831680.

The previous prime is 11100221959. The next prime is 11100222013. The reversal of 11100222012 is 21022200111.

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 (11100222013) 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, 200163 + ... + 249530.

It is an arithmetic number, because the mean of its divisors is an integer number (418665114).

Almost surely, 2^11100222012 is an apocalyptic number.

11100222012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11100222012 is an abundant number, since it is smaller than the sum of its proper divisors (19043666196).

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

11100222012 is a wasteful number, since it uses less digits than its factorization.

11100222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449739 (or 449726 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11100222012 its reverse (21022200111), we get a palindrome (32122422123).

The spelling of 11100222012 in words is "eleven billion, one hundred million, two hundred twenty-two thousand, twelve".