84631712221 has 32 divisors (see below), whose sum is σ = 103240811520. Its totient is φ = 67722345216.

The previous prime is 84631712173. The next prime is 84631712251. The reversal of 84631712221 is 12221713648.

It is a cyclic number.

It is not a de Polignac number, because 84631712221 - 2⁹ = 84631711709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84631712251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31542346 + ... + 31545028.

It is an arithmetic number, because the mean of its divisors is an integer number (3226275360).

Almost surely, 2^84631712221 is an apocalyptic number.

It is an amenable number.

84631712221 is a deficient number, since it is larger than the sum of its proper divisors (18609099299).

84631712221 is a wasteful number, since it uses less digits than its factorization.

84631712221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4753.

The product of its digits is 32256, while the sum is 37.

The spelling of 84631712221 in words is "eighty-four billion, six hundred thirty-one million, seven hundred twelve thousand, two hundred twenty-one".