51021312122 has 16 divisors (see below), whose sum is σ = 83520914400. Its totient is φ = 23182757040.

The previous prime is 51021312079. The next prime is 51021312143. The reversal of 51021312122 is 22121312015.

It is a junction number, because it is equal to n+sod(n) for n = 51021312094 and 51021312103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377597 + ... + 494592.

It is an arithmetic number, because the mean of its divisors is an integer number (5220057150).

Almost surely, 2^51021312122 is an apocalyptic number.

51021312122 is a deficient number, since it is larger than the sum of its proper divisors (32499602278).

51021312122 is a wasteful number, since it uses less digits than its factorization.

51021312122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874861.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 51021312122 its reverse (22121312015), we get a palindrome (73142624137).

The spelling of 51021312122 in words is "fifty-one billion, twenty-one million, three hundred twelve thousand, one hundred twenty-two".