51222101013 has 24 divisors (see below), whose sum is σ = 74853394200. Its totient is φ = 33750595584.

The previous prime is 51222101011. The next prime is 51222101059. The reversal of 51222101013 is 31010122215.

It can be written as a sum of positive squares in 4 ways, for example, as 37359864369 + 13862236644 = 193287^2 + 117738^2 .

It is not a de Polignac number, because 51222101013 - 2¹ = 51222101011 is a prime.

It is a super-3 number, since 3×51222101013³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51222101011) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 191653 + ... + 373061.

It is an arithmetic number, because the mean of its divisors is an integer number (3118891425).

Almost surely, 2^51222101013 is an apocalyptic number.

It is an amenable number.

51222101013 is a deficient number, since it is larger than the sum of its proper divisors (23631293187).

51222101013 is a wasteful number, since it uses less digits than its factorization.

51222101013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181781 (or 181778 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 51222101013 its reverse (31010122215), we get a palindrome (82232223228).

The spelling of 51222101013 in words is "fifty-one billion, two hundred twenty-two million, one hundred one thousand, thirteen".