51124142120 has 16 divisors (see below), whose sum is σ = 115029319860. Its totient is φ = 20449656832.

The previous prime is 51124142119. The next prime is 51124142191. The reversal of 51124142120 is 2124142115.

It can be written as a sum of positive squares in 2 ways, for example, as 50777214244 + 346927876 = 225338^2 + 18626^2 .

It is a super-2 number, since 2×51124142120² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639051737 + ... + 639051816.

Almost surely, 2^51124142120 is an apocalyptic number.

It is an amenable number.

51124142120 is an abundant number, since it is smaller than the sum of its proper divisors (63905177740).

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

51124142120 is a wasteful number, since it uses less digits than its factorization.

51124142120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278103564 (or 1278103560 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 51124142120 its reverse (2124142115), we get a palindrome (53248284235).

The spelling of 51124142120 in words is "fifty-one billion, one hundred twenty-four million, one hundred forty-two thousand, one hundred twenty".