105425353421 has 4 divisors (see below), whose sum is σ = 105429856092. Its totient is φ = 105420850752.

The previous prime is 105425353387. The next prime is 105425353457. The reversal of 105425353421 is 124353524501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124353524501 = 29 ⋅4288052569.

It can be written as a sum of positive squares in 2 ways, for example, as 27229620196 + 78195733225 = 165014^2 + 279635^2 .

It is a cyclic number.

It is not a de Polignac number, because 105425353421 - 2⁶ = 105425353357 is a prime.

It is a super-2 number, since 2×105425353421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105425353021) 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, 2216030 + ... + 2263103.

It is an arithmetic number, because the mean of its divisors is an integer number (26357464023).

Almost surely, 2^105425353421 is an apocalyptic number.

It is an amenable number.

105425353421 is a deficient number, since it is larger than the sum of its proper divisors (4502671).

105425353421 is an equidigital number, since it uses as much as digits as its factorization.

105425353421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502670.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 105425353421 its reverse (124353524501), we get a palindrome (229778877922).

The spelling of 105425353421 in words is "one hundred five billion, four hundred twenty-five million, three hundred fifty-three thousand, four hundred twenty-one".