105412101521 has 4 divisors (see below), whose sum is σ = 106746432000. Its totient is φ = 104077771044.

The previous prime is 105412101511. The next prime is 105412101523. The reversal of 105412101521 is 125101214501.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 105412101521 - 2²² = 105407907217 is a prime.

It is a super-2 number, since 2×105412101521² (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 (105412101523) 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, 667165121 + ... + 667165278.

It is an arithmetic number, because the mean of its divisors is an integer number (26686608000).

Almost surely, 2^105412101521 is an apocalyptic number.

It is an amenable number.

105412101521 is a deficient number, since it is larger than the sum of its proper divisors (1334330479).

105412101521 is an equidigital number, since it uses as much as digits as its factorization.

105412101521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334330478.

The product of its (nonzero) digits is 400, while the sum is 23.

The spelling of 105412101521 in words is "one hundred five billion, four hundred twelve million, one hundred one thousand, five hundred twenty-one".