221101078027808 has 96 divisors (see below), whose sum is σ = 475549157865600. Its totient is φ = 100355711016960.

The previous prime is 221101078027807. The next prime is 221101078027829. The reversal of 221101078027808 is 808720870101122.

It is not an unprimeable number, because it can be changed into a prime (221101078027807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1317743216 + ... + 1317910992.

It is an arithmetic number, because the mean of its divisors is an integer number (4953637061100).

Almost surely, 2^{221101078027808} is an apocalyptic number.

It is an amenable number.

221101078027808 is an abundant number, since it is smaller than the sum of its proper divisors (254448079837792).

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

221101078027808 is a wasteful number, since it uses less digits than its factorization.

221101078027808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173170 (or 173162 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 47.

The spelling of 221101078027808 in words is "two hundred twenty-one trillion, one hundred one billion, seventy-eight million, twenty-seven thousand, eight hundred eight".