1221312322230 has 384 divisors, whose sum is σ = 4009533405696. Its totient is φ = 234039859200.

The previous prime is 1221312322229. The next prime is 1221312322247. The reversal of 1221312322230 is 322232131221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221312322230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 311319049 + ... + 311322971.

It is an arithmetic number, because the mean of its divisors is an integer number (10441493244).

Almost surely, 2^{1221312322230} is an apocalyptic number.

1221312322230 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 1221312322230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2004766702848).

1221312322230 is an abundant number, since it is smaller than the sum of its proper divisors (2788221083466).

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

1221312322230 is a wasteful number, since it uses less digits than its factorization.

1221312322230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5452 (or 5445 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1221312322230 its reverse (322232131221), we get a palindrome (1543544453451).

The spelling of 1221312322230 in words is "one trillion, two hundred twenty-one billion, three hundred twelve million, three hundred twenty-two thousand, two hundred thirty".