12211111212220 has 48 divisors (see below), whose sum is σ = 26121765600000. Its totient is φ = 4793671249920.

The previous prime is 12211111212211. The next prime is 12211111212221. The reversal of 12211111212220 is 2221211111221.

It is a happy number.

It is a super-2 number, since 2×12211111212220² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211111212221) 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, 10598220 + ... + 11693779.

It is an arithmetic number, because the mean of its divisors is an integer number (544203450000).

Almost surely, 2^{12211111212220} is an apocalyptic number.

12211111212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211111212220 is an abundant number, since it is smaller than the sum of its proper divisors (13910654387780).

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

12211111212220 is a wasteful number, since it uses less digits than its factorization.

12211111212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22292518 (or 22292516 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12211111212220 its reverse (2221211111221), we get a palindrome (14432322323441).

The spelling of 12211111212220 in words is "twelve trillion, two hundred eleven billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty".