51021035120 has 320 divisors, whose sum is σ = 140714029440. Its totient is φ = 16996761600.

The previous prime is 51021035101. The next prime is 51021035147. The reversal of 51021035120 is 2153012015.

It is a happy number.

51021035120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 51021035092 and 51021035101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 181569380 + ... + 181569660.

It is an arithmetic number, because the mean of its divisors is an integer number (439731342).

Almost surely, 2^51021035120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51021035120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70357014720).

51021035120 is an abundant number, since it is smaller than the sum of its proper divisors (89692994320).

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

51021035120 is a wasteful number, since it uses less digits than its factorization.

51021035120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 51021035120 its reverse (2153012015), we get a palindrome (53174047135).

The spelling of 51021035120 in words is "fifty-one billion, twenty-one million, thirty-five thousand, one hundred twenty".