1234221100220 has 24 divisors (see below), whose sum is σ = 2592509061408. Its totient is φ = 493565630400.

The previous prime is 1234221100181. The next prime is 1234221100243. The reversal of 1234221100220 is 220011224321.

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 = 1234221100192 and 1234221100201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7593176 + ... + 7754015.

It is an arithmetic number, because the mean of its divisors is an integer number (108021210892).

Almost surely, 2^{1234221100220} is an apocalyptic number.

1234221100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1234221100220 is an abundant number, since it is smaller than the sum of its proper divisors (1358287961188).

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

1234221100220 is a wasteful number, since it uses less digits than its factorization.

1234221100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15351221 (or 15351219 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1234221100220 its reverse (220011224321), we get a palindrome (1454232324541).

The spelling of 1234221100220 in words is "one trillion, two hundred thirty-four billion, two hundred twenty-one million, one hundred thousand, two hundred twenty".