12211231213220 has 24 divisors (see below), whose sum is σ = 27616169052024. Its totient is φ = 4508762294016.

The previous prime is 12211231213219. The next prime is 12211231213253. The reversal of 12211231213220 is 2231213211221.

It can be written as a sum of positive squares in 4 ways, for example, as 38012521024 + 12173218692196 = 194968^2 + 3489014^2 .

It is a super-2 number, since 2×12211231213220² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23483136689 + ... + 23483137208.

It is an arithmetic number, because the mean of its divisors is an integer number (1150673710501).

Almost surely, 2^{12211231213220} is an apocalyptic number.

12211231213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211231213220 is an abundant number, since it is smaller than the sum of its proper divisors (15404937838804).

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

12211231213220 is a wasteful number, since it uses less digits than its factorization.

12211231213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46966273919 (or 46966273917 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 12211231213220 its reverse (2231213211221), we get a palindrome (14442444424441).

The spelling of 12211231213220 in words is "twelve trillion, two hundred eleven billion, two hundred thirty-one million, two hundred thirteen thousand, two hundred twenty".