1221321030030 has 96 divisors (see below), whose sum is σ = 3275663478048. Its totient is φ = 315565113600.

The previous prime is 1221321029987. The next prime is 1221321030049. The reversal of 1221321030030 is 300301231221.

1221321030030 is a `hidden beast` number, since 12 + 2 + 1 + 321 + 0 + 300 + 30 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1221321029985 and 1221321030012.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1292341 + ... + 2028000.

It is an arithmetic number, because the mean of its divisors is an integer number (34121494563).

Almost surely, 2^{1221321030030} is an apocalyptic number.

1221321030030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221321030030 is an abundant number, since it is smaller than the sum of its proper divisors (2054342448018).

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

1221321030030 is a wasteful number, since it uses less digits than its factorization.

1221321030030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320482 (or 3320479 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1221321030030 its reverse (300301231221), we get a palindrome (1521622261251).

The spelling of 1221321030030 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-one million, thirty thousand, thirty".