12011211121120 has 48 divisors (see below), whose sum is σ = 28376733838320. Its totient is φ = 4804442532864.

The previous prime is 12011211121111. The next prime is 12011211121123. The reversal of 12011211121120 is 2112111211021.

It is a super-2 number, since 2×12011211121120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 12011211121094 and 12011211121103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011211121123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23446276 + ... + 23953084.

It is an arithmetic number, because the mean of its divisors is an integer number (591181954965).

Almost surely, 2^{12011211121120} is an apocalyptic number.

12011211121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011211121120 is an abundant number, since it is smaller than the sum of its proper divisors (16365522717200).

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

12011211121120 is a wasteful number, since it uses less digits than its factorization.

12011211121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654947 (or 654939 counting only the distinct ones).

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

Adding to 12011211121120 its reverse (2112111211021), we get a palindrome (14123322332141).

The spelling of 12011211121120 in words is "twelve trillion, eleven billion, two hundred eleven million, one hundred twenty-one thousand, one hundred twenty".