1221032302320 has 160 divisors (see below), whose sum is σ = 3806297934912. Its totient is φ = 323795091456.

The previous prime is 1221032302271. The next prime is 1221032302349. The reversal of 1221032302320 is 232032301221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222935422 + ... + 222940898.

Almost surely, 2^{1221032302320} is an apocalyptic number.

1221032302320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221032302320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1903148967456).

1221032302320 is an abundant number, since it is smaller than the sum of its proper divisors (2585265632592).

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

1221032302320 is a wasteful number, since it uses less digits than its factorization.

1221032302320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10499 (or 10493 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 1221032302320 its reverse (232032301221), we get a palindrome (1453064603541).

The spelling of 1221032302320 in words is "one trillion, two hundred twenty-one billion, thirty-two million, three hundred two thousand, three hundred twenty".