105047383821 has 4 divisors (see below), whose sum is σ = 140063178432. Its totient is φ = 70031589212.

The previous prime is 105047383817. The next prime is 105047383829. The reversal of 105047383821 is 128383740501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 128383740501 = 3 ⋅42794580167.

It is a cyclic number.

It is not a de Polignac number, because 105047383821 - 2² = 105047383817 is a prime.

It is a super-2 number, since 2×105047383821² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105047383829) 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, 17507897301 + ... + 17507897306.

It is an arithmetic number, because the mean of its divisors is an integer number (35015794608).

Almost surely, 2^105047383821 is an apocalyptic number.

It is an amenable number.

105047383821 is a deficient number, since it is larger than the sum of its proper divisors (35015794611).

105047383821 is an equidigital number, since it uses as much as digits as its factorization.

105047383821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35015794610.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 105047383821 in words is "one hundred five billion, forty-seven million, three hundred eighty-three thousand, eight hundred twenty-one".