101828192821 has 4 divisors (see below), whose sum is σ = 103749479532. Its totient is φ = 99906906112.

The previous prime is 101828192789. The next prime is 101828192831. The reversal of 101828192821 is 128291828101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87977492100 + 13850700721 = 296610^2 + 117689^2 .

It is a cyclic number.

It is not a de Polignac number, because 101828192821 - 2⁵ = 101828192789 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 (101828192831) 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 3 ways as a sum of consecutive naturals, for example, 960643276 + ... + 960643381.

It is an arithmetic number, because the mean of its divisors is an integer number (25937369883).

Almost surely, 2^101828192821 is an apocalyptic number.

It is an amenable number.

101828192821 is a deficient number, since it is larger than the sum of its proper divisors (1921286711).

101828192821 is an equidigital number, since it uses as much as digits as its factorization.

101828192821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921286710.

The product of its (nonzero) digits is 36864, while the sum is 43.

The spelling of 101828192821 in words is "one hundred one billion, eight hundred twenty-eight million, one hundred ninety-two thousand, eight hundred twenty-one".