1280221024320 has 252 divisors, whose sum is σ = 5122354303404. Its totient is φ = 292621916160.

The previous prime is 1280221024301. The next prime is 1280221024331. The reversal of 1280221024320 is 234201220821.

1280221024320 is a `hidden beast` number, since 1 + 2 + 8 + 0 + 221 + 0 + 2 + 432 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 604773739584 + 675447284736 = 777672^2 + 821856^2 .

It is a tau number, because it is divible by the number of its divisors (252).

It is a super-2 number, since 2×1280221024320² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4394811 + ... + 4677050.

Almost surely, 2^{1280221024320} is an apocalyptic number.

1280221024320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280221024320 is an abundant number, since it is smaller than the sum of its proper divisors (3842133279084).

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

1280221024320 is a wasteful number, since it uses less digits than its factorization.

1280221024320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9071898 (or 9071878 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The spelling of 1280221024320 in words is "one trillion, two hundred eighty billion, two hundred twenty-one million, twenty-four thousand, three hundred twenty".