1321528181103 has 16 divisors (see below), whose sum is σ = 2108421030240. Its totient is φ = 813248111232.

The previous prime is 1321528180963. The next prime is 1321528181117. The reversal of 1321528181103 is 3011818251231.

1321528181103 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 528 + 18 + 110 + 3 = 666.

It is not a de Polignac number, because 1321528181103 - 2¹³ = 1321528172911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321528182103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1882518426 + ... + 1882519127.

It is an arithmetic number, because the mean of its divisors is an integer number (131776314390).

Almost surely, 2^{1321528181103} is an apocalyptic number.

1321528181103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321528181103 is a deficient number, since it is larger than the sum of its proper divisors (786892849137).

1321528181103 is a wasteful number, since it uses less digits than its factorization.

1321528181103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765037575 (or 3765037569 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 1321528181103 in words is "one trillion, three hundred twenty-one billion, five hundred twenty-eight million, one hundred eighty-one thousand, one hundred three".