1214245221 has 16 divisors (see below), whose sum is σ = 1877896704. Its totient is φ = 683497584.

The previous prime is 1214245181. The next prime is 1214245237. The reversal of 1214245221 is 1225424121.

It is not a de Polignac number, because 1214245221 - 2⁷ = 1214245093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1214245191 and 1214245200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214245261) 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 in 15 ways as a sum of consecutive naturals, for example, 430095 + ... + 432908.

It is an arithmetic number, because the mean of its divisors is an integer number (117368544).

Almost surely, 2^1214245221 is an apocalyptic number.

It is an amenable number.

1214245221 is a deficient number, since it is larger than the sum of its proper divisors (663651483).

1214245221 is an equidigital number, since it uses as much as digits as its factorization.

1214245221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863080.

The product of its digits is 1280, while the sum is 24.

The square root of 1214245221 is about 34846.0215950114. The cubic root of 1214245221 is about 1066.8469852166.

Adding to 1214245221 its reverse (1225424121), we get a palindrome (2439669342).

The spelling of 1214245221 in words is "one billion, two hundred fourteen million, two hundred forty-five thousand, two hundred twenty-one".