51222101011 has 2 divisors, whose sum is σ = 51222101012. Its totient is φ = 51222101010.

The previous prime is 51222101003. The next prime is 51222101059. The reversal of 51222101011 is 11010122215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51222101011 - 2³ = 51222101003 is a prime.

It is a super-4 number, since 4×51222101011⁴ (a number of 44 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (51222101081) 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 as a sum of consecutive naturals, namely, 25611050505 + 25611050506.

It is an arithmetic number, because the mean of its divisors is an integer number (25611050506).

Almost surely, 2^51222101011 is an apocalyptic number.

51222101011 is a deficient number, since it is larger than the sum of its proper divisors (1).

51222101011 is an equidigital number, since it uses as much as digits as its factorization.

51222101011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 51222101011 its reverse (11010122215), we get a palindrome (62232223226).

The spelling of 51222101011 in words is "fifty-one billion, two hundred twenty-two million, one hundred one thousand, eleven".