221340042155104 has 48 divisors (see below), whose sum is σ = 463465380002688. Its totient is φ = 103692934490112.

The previous prime is 221340042155041. The next prime is 221340042155117. The reversal of 221340042155104 is 401551240043122.

It is a super-2 number, since 2×221340042155104² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 221340042155104.

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, 912154647 + ... + 912397270.

It is an arithmetic number, because the mean of its divisors is an integer number (9655528750056).

Almost surely, 2^{221340042155104} is an apocalyptic number.

It is an amenable number.

221340042155104 is an abundant number, since it is smaller than the sum of its proper divisors (242125337847584).

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

221340042155104 is a wasteful number, since it uses less digits than its factorization.

221340042155104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824552167 (or 1824552159 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 221340042155104 its reverse (401551240043122), we get a palindrome (622891282198226).

The spelling of 221340042155104 in words is "two hundred twenty-one trillion, three hundred forty billion, forty-two million, one hundred fifty-five thousand, one hundred four".