12212201122220 has 48 divisors (see below), whose sum is σ = 28099213178400. Its totient is φ = 4421408248320.

The previous prime is 12212201122213. The next prime is 12212201122229. The reversal of 12212201122220 is 2222110221221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12212201122192 and 12212201122201.

It is not an unprimeable number, because it can be changed into a prime (12212201122229) 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, 121150505 + ... + 121251264.

It is an arithmetic number, because the mean of its divisors is an integer number (585400274550).

Almost surely, 2^{12212201122220} is an apocalyptic number.

12212201122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212201122220 is an abundant number, since it is smaller than the sum of its proper divisors (15887012056180).

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

12212201122220 is a wasteful number, since it uses less digits than its factorization.

12212201122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242402018 (or 242402016 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12212201122220 its reverse (2222110221221), we get a palindrome (14434311343441).

Subtracting from 12212201122220 its reverse (2222110221221), we obtain a palindrome (9990090900999).

The spelling of 12212201122220 in words is "twelve trillion, two hundred twelve billion, two hundred one million, one hundred twenty-two thousand, two hundred twenty".