75012421042 has 16 divisors (see below), whose sum is σ = 121801763160.
Its totient is φ = 34441731072.
The previous prime is 75012421039. The next prime is 75012421079. The reversal of 75012421042 is 24012421057.
Adding to 75012421042 its reverse (24012421057), we get a palindrome (99024842099).
It can be written as a sum of positive squares in 4 ways, for example, as 19965407401 + 55047013641 = 141299^2 + 234621^2
It is a self number, because there is not a number n which added to its sum of digits gives 75012421042.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7469317 + ... + 7479352.
Almost surely, 275012421042 is an apocalyptic number.
75012421042 is a deficient number, since it is larger than the sum of its proper divisors (46789342118).
75012421042 is a wasteful number, since it uses less digits than its factorization.
75012421042 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 14948877.
The product of its (nonzero) digits is 4480, while the sum is 28.
The spelling of 75012421042 in words is "seventy-five billion, twelve million, four hundred twenty-one thousand, forty-two".