84221211278840 has 16 divisors (see below), whose sum is σ = 189497725377480. Its totient is φ = 33688484511520.

The previous prime is 84221211278839. The next prime is 84221211278909. The reversal of 84221211278840 is 4887211212248.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052765140946 + ... + 1052765141025.

Almost surely, 2^{84221211278840} is an apocalyptic number.

It is an amenable number.

84221211278840 is an abundant number, since it is smaller than the sum of its proper divisors (105276514098640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84221211278840 is a wasteful number, since it uses less digits than its factorization.

84221211278840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105530281982 (or 2105530281978 counting only the distinct ones).

The product of its (nonzero) digits is 917504, while the sum is 50.

The spelling of 84221211278840 in words is "eighty-four trillion, two hundred twenty-one billion, two hundred eleven million, two hundred seventy-eight thousand, eight hundred forty".