12002211212220 has 144 divisors (see below), whose sum is σ = 37592265634560. Its totient is φ = 3096426009600.

The previous prime is 12002211212209. The next prime is 12002211212227. The reversal of 12002211212220 is 2221211220021.

It is a happy number.

12002211212220 is a `hidden beast` number, since 1 + 20 + 0 + 2 + 211 + 212 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12002211212193 and 12002211212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002211212227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18593280 + ... + 19227960.

It is an arithmetic number, because the mean of its divisors is an integer number (261057400240).

Almost surely, 2^{12002211212220} is an apocalyptic number.

12002211212220 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 12002211212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18796132817280).

12002211212220 is an abundant number, since it is smaller than the sum of its proper divisors (25590054422340).

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

12002211212220 is a wasteful number, since it uses less digits than its factorization.

12002211212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638116 (or 638111 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12002211212220 its reverse (2221211220021), we get a palindrome (14223422432241).

The spelling of 12002211212220 in words is "twelve trillion, two billion, two hundred eleven million, two hundred twelve thousand, two hundred twenty".