51221034013120 has 56 divisors (see below), whose sum is σ = 121980824211600. Its totient is φ = 20486610020352.

The previous prime is 51221034013091. The next prime is 51221034013129. The reversal of 51221034013120 is 2131043012215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51221034013129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3401490 + ... + 10677649.

Almost surely, 2^{51221034013120} is an apocalyptic number.

It is an amenable number.

51221034013120 is an abundant number, since it is smaller than the sum of its proper divisors (70759790198480).

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

51221034013120 is a wasteful number, since it uses less digits than its factorization.

51221034013120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14090525 (or 14090515 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 51221034013120 its reverse (2131043012215), we get a palindrome (53352077025335).

The spelling of 51221034013120 in words is "fifty-one trillion, two hundred twenty-one billion, thirty-four million, thirteen thousand, one hundred twenty".