121220342 has 16 divisors (see below), whose sum is σ = 191646000. Its totient is φ = 57346560.

The previous prime is 121220339. The next prime is 121220383. The reversal of 121220342 is 243022121.

It is a self number, because there is not a number n which added to its sum of digits gives 121220342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38342 + ... + 41382.

It is an arithmetic number, because the mean of its divisors is an integer number (11977875).

Almost surely, 2^121220342 is an apocalyptic number.

121220342 is a deficient number, since it is larger than the sum of its proper divisors (70425658).

121220342 is a wasteful number, since it uses less digits than its factorization.

121220342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 121220342 is about 11010.0109900036. The cubic root of 121220342 is about 494.9087911396.

Adding to 121220342 its reverse (243022121), we get a palindrome (364242463).

The spelling of 121220342 in words is "one hundred twenty-one million, two hundred twenty thousand, three hundred forty-two".