102721328090 has 8 divisors (see below), whose sum is σ = 184898390580. Its totient is φ = 41088531232.

The previous prime is 102721328051. The next prime is 102721328093. The reversal of 102721328090 is 90823127201.

102721328090 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 101211150769 + 1510177321 = 318137^2 + 38861^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 102721328090.

It is not an unprimeable number, because it can be changed into a prime (102721328093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5136066395 + ... + 5136066414.

Almost surely, 2^102721328090 is an apocalyptic number.

102721328090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102721328090 is a deficient number, since it is larger than the sum of its proper divisors (82177062490).

102721328090 is a wasteful number, since it uses less digits than its factorization.

102721328090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10272132816.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 102721328090 in words is "one hundred two billion, seven hundred twenty-one million, three hundred twenty-eight thousand, ninety".