1214013221 has 2 divisors, whose sum is σ = 1214013222. Its totient is φ = 1214013220.

The previous prime is 1214013217. The next prime is 1214013223. The reversal of 1214013221 is 1223104121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1053002500 + 161010721 = 32450^2 + 12689^2 .

It is an emirp because it is prime and its reverse (1223104121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1214013221 - 2² = 1214013217 is a prime.

Together with 1214013223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1214013221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214013223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607006610 + 607006611.

It is an arithmetic number, because the mean of its divisors is an integer number (607006611).

Almost surely, 2^1214013221 is an apocalyptic number.

It is an amenable number.

1214013221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214013221 is an equidigital number, since it uses as much as digits as its factorization.

1214013221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1214013221 is about 34842.6925050289. The cubic root of 1214013221 is about 1066.7790351130.

Adding to 1214013221 its reverse (1223104121), we get a palindrome (2437117342).

The spelling of 1214013221 in words is "one billion, two hundred fourteen million, thirteen thousand, two hundred twenty-one".