84641702121 has 12 divisors (see below), whose sum is σ = 122725107648. Its totient is φ = 56213245464.

The previous prime is 84641702087. The next prime is 84641702141. The reversal of 84641702121 is 12120714648.

It is a happy number.

84641702121 is a `hidden beast` number, since 8 + 4 + 641 + 7 + 0 + 2 + 1 + 2 + 1 = 666.

It is not a de Polignac number, because 84641702121 - 2⁷ = 84641701993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84641702141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17877165 + ... + 17881898.

It is an arithmetic number, because the mean of its divisors is an integer number (10227092304).

Almost surely, 2^84641702121 is an apocalyptic number.

It is an amenable number.

84641702121 is a deficient number, since it is larger than the sum of its proper divisors (38083405527).

84641702121 is a wasteful number, since it uses less digits than its factorization.

84641702121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35759332 (or 35759329 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 84641702121 in words is "eighty-four billion, six hundred forty-one million, seven hundred two thousand, one hundred twenty-one".