221167861340 has 24 divisors (see below), whose sum is σ = 479434849152. Its totient is φ = 85613365440.

The previous prime is 221167861259. The next prime is 221167861351. The reversal of 221167861340 is 43168761122.

221167861340 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 an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 178360559 + ... + 178361798.

It is an arithmetic number, because the mean of its divisors is an integer number (19976452048).

Almost surely, 2^221167861340 is an apocalyptic number.

221167861340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221167861340 is an abundant number, since it is smaller than the sum of its proper divisors (258266987812).

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

221167861340 is a wasteful number, since it uses less digits than its factorization.

221167861340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356722397 (or 356722395 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 221167861340 in words is "two hundred twenty-one billion, one hundred sixty-seven million, eight hundred sixty-one thousand, three hundred forty".