511121011 has 2 divisors, whose sum is σ = 511121012. Its totient is φ = 511121010.

The previous prime is 511120999. The next prime is 511121021. The reversal of 511121011 is 110121115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 511121011 - 2¹⁵ = 511088243 is a prime.

It is a super-2 number, since 2×511121011² = 522489375771324242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 511120982 and 511121000.

It is not a weakly prime, because it can be changed into another prime (511121021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255560505 + 255560506.

It is an arithmetic number, because the mean of its divisors is an integer number (255560506).

Almost surely, 2^511121011 is an apocalyptic number.

511121011 is a deficient number, since it is larger than the sum of its proper divisors (1).

511121011 is an equidigital number, since it uses as much as digits as its factorization.

511121011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10, while the sum is 13.

The square root of 511121011 is about 22607.9855582049. The cubic root of 511121011 is about 799.5419309952.

Adding to 511121011 its reverse (110121115), we get a palindrome (621242126).

The spelling of 511121011 in words is "five hundred eleven million, one hundred twenty-one thousand, eleven".