1221233332320 has 120 divisors (see below), whose sum is σ = 4309936014384. Its totient is φ = 325662218496.

The previous prime is 1221233332247. The next prime is 1221233332327. The reversal of 1221233332320 is 232333321221.

1221233332320 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 2 + 3 + 3 + 332 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221233332327) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47102524 + ... + 47128443.

Almost surely, 2^{1221233332320} is an apocalyptic number.

1221233332320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221233332320 is an abundant number, since it is smaller than the sum of its proper divisors (3088702682064).

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

1221233332320 is an equidigital number, since it uses as much as digits as its factorization.

1221233332320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94230994 (or 94230977 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 1221233332320 its reverse (232333321221), we get a palindrome (1453566653541).

The spelling of 1221233332320 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-three million, three hundred thirty-two thousand, three hundred twenty".