1221110103220 has 96 divisors (see below), whose sum is σ = 2934938603520. Its totient is φ = 418056291840.

The previous prime is 1221110103217. The next prime is 1221110103229. The reversal of 1221110103220 is 223010111221.

It is a super-2 number, since 2×1221110103220² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221110103194 and 1221110103203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221110103229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 578449965 + ... + 578452075.

It is an arithmetic number, because the mean of its divisors is an integer number (30572277120).

Almost surely, 2^{1221110103220} is an apocalyptic number.

1221110103220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221110103220 is an abundant number, since it is smaller than the sum of its proper divisors (1713828500300).

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

1221110103220 is a wasteful number, since it uses less digits than its factorization.

1221110103220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6193 (or 6191 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1221110103220 its reverse (223010111221), we get a palindrome (1444120214441).

The spelling of 1221110103220 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, one hundred three thousand, two hundred twenty".