511031414221 has 2 divisors, whose sum is σ = 511031414222. Its totient is φ = 511031414220.

The previous prime is 511031414219. The next prime is 511031414251. The reversal of 511031414221 is 122414130115.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497750004196 + 13281410025 = 705514^2 + 115245^2 .

It is a cyclic number.

It is not a de Polignac number, because 511031414221 - 2¹ = 511031414219 is a prime.

It is a super-2 number, since 2×511031414221² (a number of 24 digits) contains 22 as substring.

Together with 511031414219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511031414251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255515707110 + 255515707111.

It is an arithmetic number, because the mean of its divisors is an integer number (255515707111).

Almost surely, 2^511031414221 is an apocalyptic number.

It is an amenable number.

511031414221 is a deficient number, since it is larger than the sum of its proper divisors (1).

511031414221 is an equidigital number, since it uses as much as digits as its factorization.

511031414221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 511031414221 its reverse (122414130115), we get a palindrome (633445544336).

The spelling of 511031414221 in words is "five hundred eleven billion, thirty-one million, four hundred fourteen thousand, two hundred twenty-one".