1230221211 has 4 divisors (see below), whose sum is σ = 1640294952. Its totient is φ = 820147472.

The previous prime is 1230221203. The next prime is 1230221233. The reversal of 1230221211 is 1121220321.

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 1230221211 - 2³ = 1230221203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1230221261) 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, 205036866 + ... + 205036871.

It is an arithmetic number, because the mean of its divisors is an integer number (410073738).

Almost surely, 2^1230221211 is an apocalyptic number.

1230221211 is a deficient number, since it is larger than the sum of its proper divisors (410073741).

1230221211 is an equidigital number, since it uses as much as digits as its factorization.

1230221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410073740.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1230221211 is about 35074.5094192349. The cubic root of 1230221211 is about 1071.5054974380.

Adding to 1230221211 its reverse (1121220321), we get a palindrome (2351441532).

The spelling of 1230221211 in words is "one billion, two hundred thirty million, two hundred twenty-one thousand, two hundred eleven".