1222120222220 has 48 divisors (see below), whose sum is σ = 2594808621216. Its totient is φ = 483457920000.

The previous prime is 1222120222199. The next prime is 1222120222261. The reversal of 1222120222220 is 222220212221.

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 = 1222120222192 and 1222120222201.

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, 1436255 + ... + 2122985.

It is an arithmetic number, because the mean of its divisors is an integer number (54058512942).

Almost surely, 2^{1222120222220} is an apocalyptic number.

1222120222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222120222220 is an abundant number, since it is smaller than the sum of its proper divisors (1372688398996).

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

1222120222220 is a wasteful number, since it uses less digits than its factorization.

1222120222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687722 (or 687720 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 1222120222220 its reverse (222220212221), we get a palindrome (1444340434441).

Subtracting from 1222120222220 its reverse (222220212221), we obtain a palindrome (999900009999).

The spelling of 1222120222220 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, two hundred twenty-two thousand, two hundred twenty".