1221330223230 has 128 divisors (see below), whose sum is σ = 3279208375296. Its totient is φ = 289171276800.

The previous prime is 1221330223153. The next prime is 1221330223231. The reversal of 1221330223230 is 323220331221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221330223230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221330223231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 597397 + ... + 1673183.

It is an arithmetic number, because the mean of its divisors is an integer number (25618815432).

Almost surely, 2^{1221330223230} is an apocalyptic number.

1221330223230 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 1221330223230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1639604187648).

1221330223230 is an abundant number, since it is smaller than the sum of its proper divisors (2057878152066).

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

1221330223230 is a wasteful number, since it uses less digits than its factorization.

1221330223230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075922.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 1221330223230 its reverse (323220331221), we get a palindrome (1544550554451).

The spelling of 1221330223230 in words is "one trillion, two hundred twenty-one billion, three hundred thirty million, two hundred twenty-three thousand, two hundred thirty".