12211021212220 has 12 divisors (see below), whose sum is σ = 25643144545704. Its totient is φ = 4884408484880.

The previous prime is 12211021212193. The next prime is 12211021212223. The reversal of 12211021212220 is 2221212011221.

12211021212220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211021212223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305275530286 + ... + 305275530325.

It is an arithmetic number, because the mean of its divisors is an integer number (2136928712142).

Almost surely, 2^{12211021212220} is an apocalyptic number.

12211021212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211021212220 is an abundant number, since it is smaller than the sum of its proper divisors (13432123333484).

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

12211021212220 is a wasteful number, since it uses less digits than its factorization.

12211021212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610551060620 (or 610551060618 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12211021212220 its reverse (2221212011221), we get a palindrome (14432233223441).

The spelling of 12211021212220 in words is "twelve trillion, two hundred eleven billion, twenty-one million, two hundred twelve thousand, two hundred twenty".