11121210222012 has 72 divisors (see below), whose sum is σ = 30714544551600. Its totient is φ = 3364902731520.

The previous prime is 11121210221999. The next prime is 11121210222019. The reversal of 11121210222012 is 21022201212111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121210222019) 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, 21245137 + ... + 21762312.

It is an arithmetic number, because the mean of its divisors is an integer number (426590896550).

Almost surely, 2^{11121210222012} is an apocalyptic number.

11121210222012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11121210222012 is an abundant number, since it is smaller than the sum of its proper divisors (19593334329588).

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

11121210222012 is a wasteful number, since it uses less digits than its factorization.

11121210222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43008123 (or 43008118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11121210222012 its reverse (21022201212111), we get a palindrome (32143411434123).

Subtracting 11121210222012 from its reverse (21022201212111), we obtain a palindrome (9900990990099).

The spelling of 11121210222012 in words is "eleven trillion, one hundred twenty-one billion, two hundred ten million, two hundred twenty-two thousand, twelve".