61216120 has 32 divisors (see below), whose sum is σ = 157413600. Its totient is φ = 20988288.

The previous prime is 61216063. The next prime is 61216153. The reversal of 61216120 is 2161216.

61216120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 109035 + ... + 109594.

It is an arithmetic number, because the mean of its divisors is an integer number (4919175).

Almost surely, 2^61216120 is an apocalyptic number.

It is an amenable number.

61216120 is an abundant number, since it is smaller than the sum of its proper divisors (96197480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61216120 is a wasteful number, since it uses less digits than its factorization.

61216120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218647 (or 218643 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 61216120 is about 7824.0731080429. The cubic root of 61216120 is about 394.1140642204.

Adding to 61216120 its reverse (2161216), we get a palindrome (63377336).

The spelling of 61216120 in words is "sixty-one million, two hundred sixteen thousand, one hundred twenty".