1221111103230 has 96 divisors (see below), whose sum is σ = 3261946615200. Its totient is φ = 316707376896.

The previous prime is 1221111103217. The next prime is 1221111103253. The reversal of 1221111103230 is 323011111221.

1221111103230 is a `hidden beast` number, since 1 + 221 + 11 + 110 + 323 + 0 = 666.

It is a super-2 number, since 2×1221111103230² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8785516 + ... + 8923424.

It is an arithmetic number, because the mean of its divisors is an integer number (33978610575).

Almost surely, 2^{1221111103230} is an apocalyptic number.

1221111103230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221111103230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1630973307600).

1221111103230 is an abundant number, since it is smaller than the sum of its proper divisors (2040835511970).

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

1221111103230 is a wasteful number, since it uses less digits than its factorization.

1221111103230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140618 (or 140615 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1221111103230 its reverse (323011111221), we get a palindrome (1544122214451).

The spelling of 1221111103230 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred three thousand, two hundred thirty".