12311233212220 has 24 divisors (see below), whose sum is σ = 26745092841600. Its totient is φ = 4754683171392.

The previous prime is 12311233212217. The next prime is 12311233212227. The reversal of 12311233212220 is 2221233211321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311233212227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10613131500 + ... + 10613132659.

It is an arithmetic number, because the mean of its divisors is an integer number (1114378868400).

Almost surely, 2^{12311233212220} is an apocalyptic number.

12311233212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311233212220 is an abundant number, since it is smaller than the sum of its proper divisors (14433859629380).

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

12311233212220 is a wasteful number, since it uses less digits than its factorization.

12311233212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21226264197 (or 21226264195 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 12311233212220 its reverse (2221233211321), we get a palindrome (14532466423541).

The spelling of 12311233212220 in words is "twelve trillion, three hundred eleven billion, two hundred thirty-three million, two hundred twelve thousand, two hundred twenty".