511121311 has 2 divisors, whose sum is σ = 511121312. Its totient is φ = 511121310.

The previous prime is 511121207. The next prime is 511121323. The reversal of 511121311 is 113121115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 511121311 - 2²⁵ = 477566879 is a prime.

It is a super-2 number, since 2×511121311² = 522489989116717442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511121011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255560655 + 255560656.

It is an arithmetic number, because the mean of its divisors is an integer number (255560656).

Almost surely, 2^511121311 is an apocalyptic number.

511121311 is a deficient number, since it is larger than the sum of its proper divisors (1).

511121311 is an equidigital number, since it uses as much as digits as its factorization.

511121311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30, while the sum is 16.

The square root of 511121311 is about 22607.9921930277. The cubic root of 511121311 is about 799.5420874243.

Adding to 511121311 its reverse (113121115), we get a palindrome (624242426).

The spelling of 511121311 in words is "five hundred eleven million, one hundred twenty-one thousand, three hundred eleven".