105054240521 has 4 divisors (see below), whose sum is σ = 105223957200. Its totient is φ = 104884523844.

The previous prime is 105054240481. The next prime is 105054240581. The reversal of 105054240521 is 125042450501.

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: 125042450501 = 887 ⋅140972323.

It is a cyclic number.

It is not a de Polignac number, because 105054240521 - 2²⁶ = 104987131657 is a prime.

It is a super-2 number, since 2×105054240521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105054240581) 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, 84857411 + ... + 84858648.

It is an arithmetic number, because the mean of its divisors is an integer number (26305989300).

Almost surely, 2^105054240521 is an apocalyptic number.

It is an amenable number.

105054240521 is a deficient number, since it is larger than the sum of its proper divisors (169716679).

105054240521 is an equidigital number, since it uses as much as digits as its factorization.

105054240521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169716678.

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 105054240521 in words is "one hundred five billion, fifty-four million, two hundred forty thousand, five hundred twenty-one".