105240120442 has 8 divisors (see below), whose sum is σ = 157926599316. Its totient is φ = 52597920672.

The previous prime is 105240120439. The next prime is 105240120463. The reversal of 105240120442 is 244021042501.

It can be written as a sum of positive squares in 2 ways, for example, as 90878734521 + 14361385921 = 301461^2 + 119839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×105240120442² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11063833 + ... + 11073340.

Almost surely, 2^105240120442 is an apocalyptic number.

105240120442 is a deficient number, since it is larger than the sum of its proper divisors (52686478874).

105240120442 is a wasteful number, since it uses less digits than its factorization.

105240120442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22139552.

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 105240120442 its reverse (244021042501), we get a palindrome (349261162943).

The spelling of 105240120442 in words is "one hundred five billion, two hundred forty million, one hundred twenty thousand, four hundred forty-two".