221377328060 has 96 divisors (see below), whose sum is σ = 555520896000. Its totient is φ = 72454745088.

The previous prime is 221377327981. The next prime is 221377328063. The reversal of 221377328060 is 60823773122.

It is a junction number, because it is equal to n+sod(n) for n = 221377327999 and 221377328017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221377328063) 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, 1537892 + ... + 1675668.

It is an arithmetic number, because the mean of its divisors is an integer number (5786676000).

Almost surely, 2^221377328060 is an apocalyptic number.

221377328060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221377328060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277760448000).

221377328060 is an abundant number, since it is smaller than the sum of its proper divisors (334143567940).

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

221377328060 is a wasteful number, since it uses less digits than its factorization.

221377328060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138315 (or 138313 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 221377328060 in words is "two hundred twenty-one billion, three hundred seventy-seven million, three hundred twenty-eight thousand, sixty".