221222022124240 has 40 divisors (see below), whose sum is σ = 514382177342088. Its totient is φ = 88481759232000.

The previous prime is 221222022124223. The next prime is 221222022124261. The reversal of 221222022124240 is 42421220222122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33779855457936 + 187442166666304 = 5812044^2 + 13690952^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 221222022124199 and 221222022124208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109139761 + ... + 111148240.

Almost surely, 2^{221222022124240} is an apocalyptic number.

221222022124240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222022124240 is an abundant number, since it is smaller than the sum of its proper divisors (293160155217848).

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

221222022124240 is a wasteful number, since it uses less digits than its factorization.

221222022124240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220300567 (or 220300561 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 221222022124240 its reverse (42421220222122), we get a palindrome (263643242346362).

The spelling of 221222022124240 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, twenty-two million, one hundred twenty-four thousand, two hundred forty".