105143112661442 has 4 divisors (see below), whose sum is σ = 157714668992166. Its totient is φ = 52571556330720.

The previous prime is 105143112661417. The next prime is 105143112661471. The reversal of 105143112661442 is 244166211341501.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 77218556933281 + 27924555728161 = 8787409^2 + 5284369^2 .

It is a super-2 number, since 2×105143112661442² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105143112661442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26285778165359 + ... + 26285778165362.

Almost surely, 2^{105143112661442} is an apocalyptic number.

105143112661442 is a deficient number, since it is larger than the sum of its proper divisors (52571556330724).

105143112661442 is an equidigital number, since it uses as much as digits as its factorization.

105143112661442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52571556330723.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 105143112661442 in words is "one hundred five trillion, one hundred forty-three billion, one hundred twelve million, six hundred sixty-one thousand, four hundred forty-two".