55120012 has 6 divisors (see below), whose sum is σ = 96460028. Its totient is φ = 27560004.

The previous prime is 55120003. The next prime is 55120061. The reversal of 55120012 is 21002155.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6889998 + ... + 6890005.

Almost surely, 2^55120012 is an apocalyptic number.

It is an amenable number.

55120012 is a deficient number, since it is larger than the sum of its proper divisors (41340016).

55120012 is a wasteful number, since it uses less digits than its factorization.

55120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13780007 (or 13780005 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 55120012 is about 7424.2852854669. The cubic root of 55120012 is about 380.5716511502.

Adding to 55120012 its reverse (21002155), we get a palindrome (76122167).

The spelling of 55120012 in words is "fifty-five million, one hundred twenty thousand, twelve".