51122212112 has 20 divisors (see below), whose sum is σ = 99089414940. Its totient is φ = 25550750208.

The previous prime is 51122212109. The next prime is 51122212139. The reversal of 51122212112 is 21121222115.

51122212112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 29637688336 + 21484523776 = 172156^2 + 146576^2 .

It is a super-2 number, since 2×51122212112² (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, 606437 + ... + 685572.

It is an arithmetic number, because the mean of its divisors is an integer number (4954470747).

Almost surely, 2^51122212112 is an apocalyptic number.

It is an amenable number.

51122212112 is a deficient number, since it is larger than the sum of its proper divisors (47967202828).

51122212112 is a wasteful number, since it uses less digits than its factorization.

51122212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294490 (or 1294484 counting only the distinct ones).

The product of its digits is 160, while the sum is 20.

Adding to 51122212112 its reverse (21121222115), we get a palindrome (72243434227).

The spelling of 51122212112 in words is "fifty-one billion, one hundred twenty-two million, two hundred twelve thousand, one hundred twelve".