856117212130 has 16 divisors (see below), whose sum is σ = 1541167591104. Its totient is φ = 342412082800.

The previous prime is 856117212121. The next prime is 856117212131. The reversal of 856117212130 is 31212711658.

It is a self number, because there is not a number n which added to its sum of digits gives 856117212130.

It is not an unprimeable number, because it can be changed into a prime (856117212131) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 4246822 + ... + 4443841.

It is an arithmetic number, because the mean of its divisors is an integer number (96322974444).

Almost surely, 2^856117212130 is an apocalyptic number.

856117212130 is a deficient number, since it is larger than the sum of its proper divisors (685050378974).

856117212130 is a wasteful number, since it uses less digits than its factorization.

856117212130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8700521.

The product of its (nonzero) digits is 20160, while the sum is 37.

Adding to 856117212130 its reverse (31212711658), we get a palindrome (887329923788).

The spelling of 856117212130 in words is "eight hundred fifty-six billion, one hundred seventeen million, two hundred twelve thousand, one hundred thirty".