1222222210220 has 24 divisors (see below), whose sum is σ = 2799999973008. Its totient is φ = 444444440000.

The previous prime is 1222222210189. The next prime is 1222222210243. The reversal of 1222222210220 is 220122222221.

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 = 1222222210192 and 1222222210201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2777777531 + ... + 2777777970.

It is an arithmetic number, because the mean of its divisors is an integer number (116666665542).

Almost surely, 2^{1222222210220} is an apocalyptic number.

1222222210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222222210220 is an abundant number, since it is smaller than the sum of its proper divisors (1577777762788).

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

1222222210220 is a wasteful number, since it uses less digits than its factorization.

1222222210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555555521 (or 5555555519 counting only the distinct ones).

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

Adding to 1222222210220 its reverse (220122222221), we get a palindrome (1442344432441).

The spelling of 1222222210220 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred ten thousand, two hundred twenty".