101821448721 has 4 divisors (see below), whose sum is σ = 135761931632. Its totient is φ = 67880965812.

The previous prime is 101821448657. The next prime is 101821448737. The reversal of 101821448721 is 127844128101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 101821448721 - 2⁶ = 101821448657 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 101821448721.

It is not an unprimeable number, because it can be changed into a prime (101821448321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16970241451 + ... + 16970241456.

It is an arithmetic number, because the mean of its divisors is an integer number (33940482908).

Almost surely, 2^101821448721 is an apocalyptic number.

It is an amenable number.

101821448721 is a deficient number, since it is larger than the sum of its proper divisors (33940482911).

101821448721 is an equidigital number, since it uses as much as digits as its factorization.

101821448721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33940482910.

The product of its (nonzero) digits is 28672, while the sum is 39.

The spelling of 101821448721 in words is "one hundred one billion, eight hundred twenty-one million, four hundred forty-eight thousand, seven hundred twenty-one".