221240242113 has 96 divisors (see below), whose sum is σ = 348507411840. Its totient is φ = 124300492800.

The previous prime is 221240242099. The next prime is 221240242117. The reversal of 221240242113 is 311242042122.

221240242113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221240242113 - 2⁸ = 221240241857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221240242117) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 181790881 + ... + 181792097.

It is an arithmetic number, because the mean of its divisors is an integer number (3630285540).

Almost surely, 2^221240242113 is an apocalyptic number.

It is an amenable number.

221240242113 is a deficient number, since it is larger than the sum of its proper divisors (127267169727).

221240242113 is a wasteful number, since it uses less digits than its factorization.

221240242113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679 (or 1668 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 221240242113 its reverse (311242042122), we get a palindrome (532482284235).

Subtracting 221240242113 from its reverse (311242042122), we obtain a square (90001800009 = 300003²).

The spelling of 221240242113 in words is "two hundred twenty-one billion, two hundred forty million, two hundred forty-two thousand, one hundred thirteen".