84147388221 has 32 divisors (see below), whose sum is σ = 122916003840. Its totient is φ = 50888318400.

The previous prime is 84147388219. The next prime is 84147388229. The reversal of 84147388221 is 12288374148.

It is not a de Polignac number, because 84147388221 - 2¹ = 84147388219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84147388229) 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 31 ways as a sum of consecutive naturals, for example, 12033036 + ... + 12040026.

It is an arithmetic number, because the mean of its divisors is an integer number (3841125120).

Almost surely, 2^84147388221 is an apocalyptic number.

It is an amenable number.

84147388221 is a deficient number, since it is larger than the sum of its proper divisors (38768615619).

84147388221 is a wasteful number, since it uses less digits than its factorization.

84147388221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12297.

The product of its digits is 688128, while the sum is 48.

The spelling of 84147388221 in words is "eighty-four billion, one hundred forty-seven million, three hundred eighty-eight thousand, two hundred twenty-one".