511189870221 has 12 divisors (see below), whose sum is σ = 738396273472. Its totient is φ = 340788213576.

The previous prime is 511189870201. The next prime is 511189870291. The reversal of 511189870221 is 122078981115.

It is not a de Polignac number, because 511189870221 - 2⁶ = 511189870157 is a prime.

It is a super-2 number, since 2×511189870221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511189870201) 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 in 11 ways as a sum of consecutive naturals, for example, 286290 + ... + 1050876.

Almost surely, 2^511189870221 is an apocalyptic number.

It is an amenable number.

511189870221 is a deficient number, since it is larger than the sum of its proper divisors (227206403251).

511189870221 is a wasteful number, since it uses less digits than its factorization.

511189870221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838880 (or 838877 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 45.

The spelling of 511189870221 in words is "five hundred eleven billion, one hundred eighty-nine million, eight hundred seventy thousand, two hundred twenty-one".