1221321013230 has 64 divisors (see below), whose sum is σ = 2935726903296. Its totient is φ = 325179696000.

The previous prime is 1221321013229. The next prime is 1221321013267. The reversal of 1221321013230 is 323101231221.

It is a junction number, because it is equal to n+sod(n) for n = 1221321013197 and 1221321013206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61483500 + ... + 61503360.

It is an arithmetic number, because the mean of its divisors is an integer number (45870732864).

Almost surely, 2^{1221321013230} is an apocalyptic number.

1221321013230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221321013230 is an abundant number, since it is smaller than the sum of its proper divisors (1714405890066).

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

1221321013230 is a wasteful number, since it uses less digits than its factorization.

1221321013230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22953.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1221321013230 its reverse (323101231221), we get a palindrome (1544422244451).

The spelling of 1221321013230 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-one million, thirteen thousand, two hundred thirty".