121220353 has 8 divisors (see below), whose sum is σ = 130267872. Its totient is φ = 112385856.

The previous prime is 121220339. The next prime is 121220383. The reversal of 121220353 is 353022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121220353 - 2⁵ = 121220321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121220353.

It is not an unprimeable number, because it can be changed into a prime (121220303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52075 + ... + 54352.

It is an arithmetic number, because the mean of its divisors is an integer number (16283484).

Almost surely, 2^121220353 is an apocalyptic number.

It is an amenable number.

121220353 is a deficient number, since it is larger than the sum of its proper divisors (9047519).

121220353 is a wasteful number, since it uses less digits than its factorization.

121220353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106511.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 121220353 is about 11010.0114895490. The cubic root of 121220353 is about 494.9088061096.

Adding to 121220353 its reverse (353022121), we get a palindrome (474242474).

The spelling of 121220353 in words is "one hundred twenty-one million, two hundred twenty thousand, three hundred fifty-three".