12222220001220 has 192 divisors, whose sum is σ = 38570373676800. Its totient is φ = 3212769715200.

The previous prime is 12222220001197. The next prime is 12222220001293. The reversal of 12222220001220 is 2210002222221.

12222220001220 is a `hidden beast` number, since 1 + 2 + 222 + 220 + 0 + 0 + 1 + 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 = 12222220001193 and 12222220001202.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11886976 + ... + 12874184.

It is an arithmetic number, because the mean of its divisors is an integer number (200887362900).

Almost surely, 2^{12222220001220} is an apocalyptic number.

12222220001220 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 12222220001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19285186838400).

12222220001220 is an abundant number, since it is smaller than the sum of its proper divisors (26348153675580).

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

12222220001220 is a wasteful number, since it uses less digits than its factorization.

12222220001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987555 (or 987547 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 12222220001220 its reverse (2210002222221), we get a palindrome (14432222223441).

The spelling of 12222220001220 in words is "twelve trillion, two hundred twenty-two billion, two hundred twenty million, one thousand, two hundred twenty".