121213552 has 20 divisors (see below), whose sum is σ = 235732680. Its totient is φ = 60379328.

The previous prime is 121213549. The next prime is 121213613. The reversal of 121213552 is 255312121.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9778 + ... + 18385.

It is an arithmetic number, because the mean of its divisors is an integer number (11786634).

Almost surely, 2^121213552 is an apocalyptic number.

It is an amenable number.

121213552 is a deficient number, since it is larger than the sum of its proper divisors (114519128).

121213552 is a wasteful number, since it uses less digits than its factorization.

121213552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28440 (or 28434 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 121213552 is about 11009.7026299533. The cubic root of 121213552 is about 494.8995504094.

Adding to 121213552 its reverse (255312121), we get a palindrome (376525673).

The spelling of 121213552 in words is "one hundred twenty-one million, two hundred thirteen thousand, five hundred fifty-two".