12011101101220 has 48 divisors (see below), whose sum is σ = 27163878194880. Its totient is φ = 4434817309056.

The previous prime is 12011101101211. The next prime is 12011101101229. The reversal of 12011101101220 is 2210110111021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12011101101211) and next prime (12011101101229).

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 12011101101220.

It is not an unprimeable number, because it can be changed into a prime (12011101101229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28474611 + ... + 28893349.

It is an arithmetic number, because the mean of its divisors is an integer number (565914129060).

Almost surely, 2^{12011101101220} is an apocalyptic number.

12011101101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011101101220 is an abundant number, since it is smaller than the sum of its proper divisors (15152777093660).

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

12011101101220 is a wasteful number, since it uses less digits than its factorization.

12011101101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529084 (or 529082 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12011101101220 its reverse (2210110111021), we get a palindrome (14221211212241).

The spelling of 12011101101220 in words is "twelve trillion, eleven billion, one hundred one million, one hundred one thousand, two hundred twenty".