521222334121 has 2 divisors, whose sum is σ = 521222334122. Its totient is φ = 521222334120.

The previous prime is 521222334103. The next prime is 521222334211. The reversal of 521222334121 is 121433222125.

It is a happy number.

Together with next prime (521222334211) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 420059534400 + 101162799721 = 648120^2 + 318061^2 .

It is a cyclic number.

It is not a de Polignac number, because 521222334121 - 2⁵ = 521222334089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521222334121.

It is not a weakly prime, because it can be changed into another prime (521222331121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260611167060 + 260611167061.

It is an arithmetic number, because the mean of its divisors is an integer number (260611167061).

Almost surely, 2^521222334121 is an apocalyptic number.

It is an amenable number.

521222334121 is a deficient number, since it is larger than the sum of its proper divisors (1).

521222334121 is an equidigital number, since it uses as much as digits as its factorization.

521222334121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 28.

Adding to 521222334121 its reverse (121433222125), we get a palindrome (642655556246).

The spelling of 521222334121 in words is "five hundred twenty-one billion, two hundred twenty-two million, three hundred thirty-four thousand, one hundred twenty-one".