105810120242 has 18 divisors (see below), whose sum is σ = 161166366333. Its totient is φ = 52100251632.

The previous prime is 105810120187. The next prime is 105810120277. The reversal of 105810120242 is 242021018501.

It can be written as a sum of positive squares in 2 ways, for example, as 102695252521 + 3114867721 = 320461^2 + 55811^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=230011.

It is a super-2 number, since 2×105810120242² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30819758 + ... + 30823190.

Almost surely, 2^105810120242 is an apocalyptic number.

105810120242 is a deficient number, since it is larger than the sum of its proper divisors (55356246091).

105810120242 is an frugal number, since it uses more digits than its factorization.

105810120242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7002 (or 3502 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

Adding to 105810120242 its reverse (242021018501), we get a palindrome (347831138743).

The spelling of 105810120242 in words is "one hundred five billion, eight hundred ten million, one hundred twenty thousand, two hundred forty-two".