12311232202220 has 144 divisors (see below), whose sum is σ = 30645196404480. Its totient is φ = 4141192438656.

The previous prime is 12311232202141. The next prime is 12311232202249. The reversal of 12311232202220 is 2220223211321.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28871807 + ... + 29295113.

It is an arithmetic number, because the mean of its divisors is an integer number (212813863920).

Almost surely, 2^{12311232202220} is an apocalyptic number.

12311232202220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12311232202220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15322598202240).

12311232202220 is an abundant number, since it is smaller than the sum of its proper divisors (18333964202260).

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

12311232202220 is a wasteful number, since it uses less digits than its factorization.

12311232202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423892 (or 423883 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12311232202220 its reverse (2220223211321), we get a palindrome (14531455413541).

It can be divided in two parts, 1231123 and 2202220, that added together give a palindrome (3433343).

The spelling of 12311232202220 in words is "twelve trillion, three hundred eleven billion, two hundred thirty-two million, two hundred two thousand, two hundred twenty".