221120242 has 48 divisors (see below), whose sum is σ = 401010048. Its totient is φ = 91113120.

The previous prime is 221120239. The next prime is 221120269. The reversal of 221120242 is 242021122.

221120242 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221120242² = 97788322844277128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280573 + ... + 281359.

It is an arithmetic number, because the mean of its divisors is an integer number (8354376).

Almost surely, 2^221120242 is an apocalyptic number.

221120242 is a deficient number, since it is larger than the sum of its proper divisors (179889806).

221120242 is a wasteful number, since it uses less digits than its factorization.

221120242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911 (or 904 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 221120242 is about 14870.1123734826. The cubic root of 221120242 is about 604.7039892460.

Adding to 221120242 its reverse (242021122), we get a palindrome (463141364).

The spelling of 221120242 in words is "two hundred twenty-one million, one hundred twenty thousand, two hundred forty-two".