11281982508621 has 128 divisors (see below), whose sum is σ = 18984967372800. Its totient is φ = 6561483122880.

The previous prime is 11281982508583. The next prime is 11281982508637. The reversal of 11281982508621 is 12680528918211.

11281982508621 is a `hidden beast` number, since 1 + 1 + 2 + 8 + 1 + 9 + 8 + 2 + 5 + 0 + 8 + 621 = 666.

It is not a de Polignac number, because 11281982508621 - 2⁷ = 11281982508493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11281982508721) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1723226070 + ... + 1723232616.

It is an arithmetic number, because the mean of its divisors is an integer number (148320057600).

Almost surely, 2^{11281982508621} is an apocalyptic number.

11281982508621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11281982508621 is a deficient number, since it is larger than the sum of its proper divisors (7702984864179).

11281982508621 is a wasteful number, since it uses less digits than its factorization.

11281982508621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8956 (or 8950 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 54.

The spelling of 11281982508621 in words is "eleven trillion, two hundred eighty-one billion, nine hundred eighty-two million, five hundred eight thousand, six hundred twenty-one".