121827857503 has 8 divisors (see below), whose sum is σ = 140720947920. Its totient is φ = 104237738880.

The previous prime is 121827857491. The next prime is 121827857509. The reversal of 121827857503 is 305758728121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121827857503 - 2⁵ = 121827857471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121827857509) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 325742748 + ... + 325743121.

It is an arithmetic number, because the mean of its divisors is an integer number (17590118490).

Almost surely, 2^121827857503 is an apocalyptic number.

121827857503 is a deficient number, since it is larger than the sum of its proper divisors (18893090417).

121827857503 is a wasteful number, since it uses less digits than its factorization.

121827857503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651485897.

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 121827857503 in words is "one hundred twenty-one billion, eight hundred twenty-seven million, eight hundred fifty-seven thousand, five hundred three".