1221093510960 has 160 divisors (see below), whose sum is σ = 3881204587008. Its totient is φ = 317397104640.

The previous prime is 1221093510947. The next prime is 1221093511019. The reversal of 1221093510960 is 690153901221.

It is a Cunningham number, because it is equal to 1105031²-1.

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, 10995069 + ... + 11105571.

Almost surely, 2^{1221093510960} is an apocalyptic number.

1221093510960 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 1221093510960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1940602293504).

1221093510960 is an abundant number, since it is smaller than the sum of its proper divisors (2660111076048).

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

1221093510960 is a wasteful number, since it uses less digits than its factorization.

1221093510960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111683 (or 111677 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The spelling of 1221093510960 in words is "one trillion, two hundred twenty-one billion, ninety-three million, five hundred ten thousand, nine hundred sixty".