102720815303 has 4 divisors (see below), whose sum is σ = 102723370800. Its totient is φ = 102718259808.

The previous prime is 102720815257. The next prime is 102720815341. The reversal of 102720815303 is 303518027201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 303518027201 = 29 ⋅10466138869.

It is a cyclic number.

It is not a de Polignac number, because 102720815303 - 2¹⁴ = 102720798919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102720815303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102720815383) 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 3 ways as a sum of consecutive naturals, for example, 1216475 + ... + 1298172.

It is an arithmetic number, because the mean of its divisors is an integer number (25680842700).

Almost surely, 2^102720815303 is an apocalyptic number.

102720815303 is a deficient number, since it is larger than the sum of its proper divisors (2555497).

102720815303 is an equidigital number, since it uses as much as digits as its factorization.

102720815303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555496.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 102720815303 in words is "one hundred two billion, seven hundred twenty million, eight hundred fifteen thousand, three hundred three".