511066061221 has 4 divisors (see below), whose sum is σ = 512082097632. Its totient is φ = 510050024812.

The previous prime is 511066061197. The next prime is 511066061239. The reversal of 511066061221 is 122160660115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 511066061221 - 2¹¹ = 511066059173 is a prime.

It is a super-2 number, since 2×511066061221² (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 (511066068221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508017451 + ... + 508018456.

It is an arithmetic number, because the mean of its divisors is an integer number (128020524408).

Almost surely, 2^511066061221 is an apocalyptic number.

It is an amenable number.

511066061221 is a deficient number, since it is larger than the sum of its proper divisors (1016036411).

511066061221 is a wasteful number, since it uses less digits than its factorization.

511066061221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016036410.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 511066061221 in words is "five hundred eleven billion, sixty-six million, sixty-one thousand, two hundred twenty-one".