105642120442 has 8 divisors (see below), whose sum is σ = 159094508832. Its totient is φ = 52610617500.

The previous prime is 105642120421. The next prime is 105642120461. The reversal of 105642120442 is 244021246501.

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

It is a super-2 number, since 2×105642120442² (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, 105220734 + ... + 105221737.

It is an arithmetic number, because the mean of its divisors is an integer number (19886813604).

Almost surely, 2^105642120442 is an apocalyptic number.

105642120442 is a deficient number, since it is larger than the sum of its proper divisors (53452388390).

105642120442 is a wasteful number, since it uses less digits than its factorization.

105642120442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210442724.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 105642120442 its reverse (244021246501), we get a palindrome (349663366943).

The spelling of 105642120442 in words is "one hundred five billion, six hundred forty-two million, one hundred twenty thousand, four hundred forty-two".