1066221211 has 4 divisors (see below), whose sum is σ = 1163150424. Its totient is φ = 969292000.

The previous prime is 1066221173. The next prime is 1066221227. The reversal of 1066221211 is 1121226601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1066221211 - 2¹³ = 1066213019 is a prime.

It is a super-2 number, since 2×1066221211² = 2273655341572613042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066221311) 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, 48464590 + ... + 48464611.

It is an arithmetic number, because the mean of its divisors is an integer number (290787606).

Almost surely, 2^1066221211 is an apocalyptic number.

1066221211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1066221211 is a deficient number, since it is larger than the sum of its proper divisors (96929213).

1066221211 is an equidigital number, since it uses as much as digits as its factorization.

1066221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96929212.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1066221211 is about 32653.0429056773. The cubic root of 1066221211 is about 1021.6036580211.

Adding to 1066221211 its reverse (1121226601), we get a palindrome (2187447812).

The spelling of 1066221211 in words is "one billion, sixty-six million, two hundred twenty-one thousand, two hundred eleven".