221221100982 has 16 divisors (see below), whose sum is σ = 505648230912. Its totient is φ = 63206028840.

The previous prime is 221221100923. The next prime is 221221100987. The reversal of 221221100982 is 289001122122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221100987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2633584494 + ... + 2633584577.

It is an arithmetic number, because the mean of its divisors is an integer number (31603014432).

Almost surely, 2^221221100982 is an apocalyptic number.

221221100982 is an abundant number, since it is smaller than the sum of its proper divisors (284427129930).

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

221221100982 is a wasteful number, since it uses less digits than its factorization.

221221100982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5267169083.

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 221221100982 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred thousand, nine hundred eighty-two".