12211100012220 has 48 divisors (see below), whose sum is σ = 35115163284768. Its totient is φ = 3168285408000.

The previous prime is 12211100012173. The next prime is 12211100012261. The reversal of 12211100012220 is 2221000111221.

It is a super-2 number, since 2×12211100012220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12211100012220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2750245531 + ... + 2750249970.

It is an arithmetic number, because the mean of its divisors is an integer number (731565901766).

Almost surely, 2^{12211100012220} is an apocalyptic number.

12211100012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211100012220 is an abundant number, since it is smaller than the sum of its proper divisors (22904063272548).

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

12211100012220 is a wasteful number, since it uses less digits than its factorization.

12211100012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500495550 (or 5500495548 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12211100012220 its reverse (2221000111221), we get a palindrome (14432100123441).

Subtracting from 12211100012220 its reverse (2221000111221), we obtain a palindrome (9990099900999).

The spelling of 12211100012220 in words is "twelve trillion, two hundred eleven billion, one hundred million, twelve thousand, two hundred twenty".