221670011 has 2 divisors, whose sum is σ = 221670012. Its totient is φ = 221670010.

The previous prime is 221669983. The next prime is 221670037. The reversal of 221670011 is 110076122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221670011 - 2¹⁰ = 221668987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221670061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110835005 + 110835006.

It is an arithmetic number, because the mean of its divisors is an integer number (110835006).

Almost surely, 2^221670011 is an apocalyptic number.

221670011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221670011 is an equidigital number, since it uses as much as digits as its factorization.

221670011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 221670011 is about 14888.5866018236. The cubic root of 221670011 is about 605.2047309302.

It can be divided in two parts, 2216 and 70011, that added together give a palindrome (72227).

The spelling of 221670011 in words is "two hundred twenty-one million, six hundred seventy thousand, eleven".