221390610511 has 8 divisors (see below), whose sum is σ = 257306279040. Its totient is φ = 186547051608.

The previous prime is 221390610503. The next prime is 221390610517. The reversal of 221390610511 is 115016093122.

221390610511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221390610511 - 2³ = 221390610503 is a prime.

It is a super-2 number, since 2×221390610511² (a number of 23 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 (221390610517) 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 7 ways as a sum of consecutive naturals, for example, 268026961 + ... + 268027786.

It is an arithmetic number, because the mean of its divisors is an integer number (32163284880).

Almost surely, 2^221390610511 is an apocalyptic number.

221390610511 is a deficient number, since it is larger than the sum of its proper divisors (35915668529).

221390610511 is an equidigital number, since it uses as much as digits as its factorization.

221390610511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536054813.

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 221390610511 in words is "two hundred twenty-one billion, three hundred ninety million, six hundred ten thousand, five hundred eleven".