84212512345 has 32 divisors (see below), whose sum is σ = 109317543552. Its totient is φ = 61908682752.

The previous prime is 84212512297. The next prime is 84212512357. The reversal of 84212512345 is 54321521248.

It is a cyclic number.

It is not a de Polignac number, because 84212512345 - 2⁷ = 84212512217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31693257 + ... + 31695913.

It is an arithmetic number, because the mean of its divisors is an integer number (3416173236).

Almost surely, 2^84212512345 is an apocalyptic number.

It is an amenable number.

84212512345 is a deficient number, since it is larger than the sum of its proper divisors (25105031207).

84212512345 is a wasteful number, since it uses less digits than its factorization.

84212512345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4681.

The product of its digits is 76800, while the sum is 37.

The spelling of 84212512345 in words is "eighty-four billion, two hundred twelve million, five hundred twelve thousand, three hundred forty-five".