87991220000222 has 192 divisors, whose sum is σ = 173198825579520. Its totient is φ = 33134526432000.

The previous prime is 87991220000221. The next prime is 87991220000231. The reversal of 87991220000222 is 22200002219978.

87991220000222 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87991220000221) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1990594373 + ... + 1990638575.

It is an arithmetic number, because the mean of its divisors is an integer number (902077216560).

Almost surely, 2^{87991220000222} is an apocalyptic number.

87991220000222 is a deficient number, since it is larger than the sum of its proper divisors (85207605579298).

87991220000222 is a wasteful number, since it uses less digits than its factorization.

87991220000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44767 (or 44760 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 87991220000222 in words is "eighty-seven trillion, nine hundred ninety-one billion, two hundred twenty million, two hundred twenty-two", and thus it is an aban number.