102819921811 has 8 divisors (see below), whose sum is σ = 105333760224. Its totient is φ = 100306370880.

The previous prime is 102819921797. The next prime is 102819921857. The reversal of 102819921811 is 118129918201.

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

It is a cyclic number.

It is not a de Polignac number, because 102819921811 - 2⁵ = 102819921779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102819921881) 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 7 ways as a sum of consecutive naturals, for example, 771721 + ... + 895093.

It is an arithmetic number, because the mean of its divisors is an integer number (13166720028).

Almost surely, 2^102819921811 is an apocalyptic number.

102819921811 is a deficient number, since it is larger than the sum of its proper divisors (2513838413).

102819921811 is a wasteful number, since it uses less digits than its factorization.

102819921811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143741.

The product of its (nonzero) digits is 20736, while the sum is 43.

The spelling of 102819921811 in words is "one hundred two billion, eight hundred nineteen million, nine hundred twenty-one thousand, eight hundred eleven".